I just bought my first 360 so I've been out of the loop on Halo since the first one on XBOX.  I have Reach coming in the mail, should I try to play through Halo 2 and 3 before I go through Reach?  I know it is a prequel so the story may not really be messed up too much but I'm also curious about if I play Reach first will I get frustrated with controls or design going back to the other two?  I also have ODST coming but will probably wait to play that until the others anyways. 
 
Just curious...