If you want one that reliably feeds well I wouldn't go bargain basement. This is one of those areas you get what you pay for. I have a 223 I had a HS Precision detachable mag system installed in and a 30-338Lap Imp. that has a Seekins Det. mag system. Neither is cheap but both work extremely well and neither is just a simple drop in install. Both will require a slight amount of work.
If I was putting one in a Rem 700 for an 06, it would be an easy choice, I'd use the HS Precision Det. Mag system and be done.