I might be the odd man out, but I'd go with the KOBRA- $185. shipped from Tantal w/ mount and 1 year warranty through him (Authorized Dealer). I played on a Tourney Paintball team for the better part of 10 years, with markers shooting in the 18-22 balls/sec range, quick target aquisition is a must and I'm quite comfortable w/ Red Dots. Shooting with both eyes open is a geat benefit.
The new gen KOBRA's use 2 AA bateries, I F'ed up and left mine on for over 24hrs and it still works. Like everything, you have to maintain your equipment. Before every tourney I replaced batteries regardless. If someone ran out of adjustment, they didn't read the manual. Typical adjustment is 7 clicks, beyond that you have to back off a stop screw and you have infinite adjustment. Once you zero, you retighten the stop screw and go up to 7 clicks +/_ as needed.
You have to practice and get comfortable to elevation adjustments at different ranges. Bench rest shooting used the adjustment knob, tactical comps you have to adjust. To me the KOBRA is faster than typical red dots because your not having to look down a tube. Either are fine, I just prefer the KOBRA. Tantals has info available on all the Russian made sights, but you need to contact Doug for prices and availability-reply's are usually very quick.
http://tantal.kalashnikov.guns.ru/bstkobra.html