Beltran for me. 110+ runs, 110+ RBI, and 25 SB are excellent numbers. He's never been a big batting average guy, but a repeat .284 would be fine with me. I would like to see his HR bump back up into the 30's, getting out of Shea should help.
Sizemore -- .268, 101 R, 33 HR, 90 RBI, 38 SB
Beltran -- .284, 116 R, 27 HR, 112 RBI, 25 SB
Sizemore was our #1 OF (well not mine, but this community's). Beltran took him in three categories last year, and is no slouch in the other two. I know he's a little older and Grady has more upside (hence why I like Grady more), but moving out of Shea should help Carlos too.
I have a feeling I won't end up with Holliday at all this year. I don't want to be the one spending a top 3-4 OF pick on him only to see him take a sizable step back out of Coors. Maybe he has no problem adjusting, but his splits have me concerned enough that I'll pass entirely this year and just see how he does in '09.