I've used both OD and tan with MC and each work well, with OD working a bit better in the spring/winter and tan working better in the summer/fall seasons. I personally run tan/khaki gear for all my cammies.
If your 100% stuck on buying your gear from evike/GI (which I suggest against, as condor is crap) I'd take OD over their tan as it has a more even tone for pouch to pouch.
http://www.tacticalassaultgearstore.com/ is having a sale on all TAG and Shellback gear (30% off!) till labor day. Use FBFAN at checkout. I'm not sure if that stuff is out of your price range, but you get what you pay for, and I'll bet dollars to donkeys that it'll last longer.