Hey everyone... New user, new post... I'm debating purchasing a gently used 5D; however would like to know if there are any major differences in perfromance to the newer Mark II. Aside from the 1080p video option of the Mark II, what major advantages does the Mark II have compared to 5D. Also, in addition, what are (if any) limitations with the Mark II (I've heard issues regarding noise, black spot, etc. which firmware may fix). At the end of the day, I can snag the 5D for $1700, and is there any justification to dropping an extra $1000 on the Mark II? Any opinions/information would be helpful. Thanks!