I use CCI Standard Velocity (better quality) and CCI Blazer (cheapo), the Standard Velocity is more accurate, but slightly more expensive. Not all that bad a price for the Standard Velocity, it's cheaper than Green Tag. If you like to leave an impressive group on paper, the Standard Velocity is better for the price, Green Tag is best, but you pay for it. If you just like going through 500 rounds in a hurry, CCI Blazer works great.
I think the standard velocity ammunition types in general are supposed to be better for your action if you believe everything you read.