I’m still using metal halide on my 65 and LED on my wife’s 32. I love my halides and am looking at upgrading, likely to a ReefBrite or Hamilton system
Bulbs are more limited now but still not too hard to find (ish)
Welcome! As @Vinny Kreyling and @Uncle99 pointed out for gas exchange and a mesh top (or egg crate (a little less clean of a look and not practical for rimless tanks, I use egg crate) solve the issue. You’ll still have greater evaporation, but yea, that’s what an auto top off is for
Tank is all going to be personal preference as to what you want and what fits your space. Me personally, I’d go with whatever is shorter in height and wider front to back as I like a shallower tank with a wide footprint.
Lighting, can’t go wrong with most brand name LED. If you look towards...
Yes two should work just fine. You can also set them up as master and slave so they sync with one another.
Edit to add: I found the remote and instructions to be pretty useless but the controls were pretty simple on the light itself.