I liked Reach, I thought the campaign was solid, and I enjoyed the addition of the armor abilities. It was overall probably my favorite Halo game. I haven't played this, but I'll likely get it soon. Whats your opinion of the two games?
I seem to be in the far minority that actually had reach as their favourite halo game. and i've played two, and three.
And it's good, it's a lot faster paced, so you have to change up your play style a bit. And the matchmaking trueskill really matches you up even with other players, so after a couple of matches they can get to be pretty difficult sometimes.