Huepar 4DG.

Tom

"Best" might open a very expensive can of worms. 
Those things can go for pretty much as much as you are capable of spending.
Good enough to do what you need is the thing here.
Even the cheapest ones do ok with "level", it's the line itself that makes the difference. The width of the line where it hits the wall is part of it, as well as brightness and color. How many surfaces you need it to hit makes a difference too. Some are a bit limited in this area, but if you don't need that, it doesn't matter much. Then you have the spinning models which hit everything in a 360 degree circle, but the cost goes up with it.

Not sure what you're going to use it for but the main reason for the green laser is visibility.  If you will be using it primarily indoors a red laser will work just fine.  I've had a DeWalt 3 line laser for a number of years and, each time I look into changing to a green laser I pass on it, the improvement is just not worth the cost for my most common use case.  As you've discovered each line (vertical, horizontal, and plumb add to the cost.

Short version, don't get caught up in red vs green.  What has been useful for me is the ability to level horizontally, vertically and to project a plumb spot from floor to ceiling.  It's much easier to locate lights by laying it out on the floor than it is to try and do it on a ladder with a tape measure!

Agree with the Huepar recommendation. I was very hesitant but it's worked great for me at a fraction of the price of name brands.

I have a project ahead of me that a laser level would really help. I think I would prefer a green laser due to its brighter light, but that’s all I know.

I’ve read a number of reviews and watched some videos, but still can’t decide which level is best.

Help!

I can't help with the best, but can recommend the LASER level that is best for my purposes.  I replaced a dead Bosch single-axis red beam unit with the Huepar HP-903CG three-axis green leveler and am very happy with it.

I've been using red PLSs for years and three different ones with good results but decided to get a green laser and decided on the Milwaukee.  The horizontal adjustment is fantastic for fine adjustment.  I just used it to line up vertical lines of screws on a wall that was 16' long.  With a standard laser I would have to keep positioning for each row.  The horizontal adjustment allowed me to do five rows at a time.

I’m a big Huepar fan and got this one with the remote and fine-tune adjustment capability and have been very happy with it. Looks like it is on sale. Was informed about this by Hand-i-Craft YouTube channel. Links to product and channel below:

https://huepar.com/products/huepar-s04cg

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Short version, don't get caught up in red vs green.  What has been useful for me is the ability to level horizontally, vertically and to project a plumb spot from floor to ceiling.  It's much easier to locate lights by laying it out on the floor than it is to try and do it on a ladder with a tape measure!

A few years ago a job came up that would benefit from having a crossline laser at my disposal, but since I needed it quickly, I limited myself to version that were available locally. (I wanted one with the plumb dot, for the floor to ceiling transfer of layout Gunnyr mentioned.) There were a bunch on my shortlist, but I ended up getting the red laser version of the bosch combilaser, that worked with the 12v batteries I already had a few off. (The green version had to be ordered everywhere, and I had 2 rotarylasers with receivers for outdoor use already)

Soon after I used it for the first time I ordered the remote controlled stand, and I still like it  a lot. (the base draws it's power from the battery in the laserlevel, and both can be controlled via bluetooth with the bosch app). The motorized base can turn at 3 speeds, and the lowest speed results in very tiny steps, so I could locate the laserlevel at 1 side of the room , with the dot at certain distance from the wall, go to the other side of the room, and use the remote, to land the line at exactly the same distance at the far end. The machine itself also came with a stand with a manual fine adjustment knob, but the motorised base turns so smoothly you don't have to wait for the vertical line to stabilise.

I later used it for a metal stud ceiling, and I can see the advantage of a 360 degree laser for that application.