Maybin had too many K's and too few XBH's for a kid who's 6'3" 200 pounds.  I think the XBH's will come, but I'm not impressed.  385 AB's and 116 K's, that needs some serious work.

Upton had a pretty good walk rate, and didn't strikeout too much.  He may have the most upside, but he also had the worst season of all four guys we're talking about here.  If he puts it all together, he's the best of the bunch, I'm just not sold it happening.

Bruce had a pretty good season, and the 42 2B's is a great sign for future HR totals.  He's a kid I see ending up in RF though, keeping his value down just a bit.  I think he'll hit for the most power of the group, and I also think he's the most likely to reach his ceiling.  I can see him being like Jim Edmonds, but a notch or two below defensively.

McCutchen is a guy I'm really excited about.  I think he could be in the bigs by mid-2008.  He's a true leadoff hitter, with good on base skills, a decent amount of pop, and speed.  It's possible he could add 20 pounds and maybe an inch or two and be more comparable physically to the others in the discussion.  I think he could be the player Milton Bradley looked to be in 2003.  A potential 20-20 guy at least, with a possible 900 OPS would be ok from a leadoff hitter, especially one playing above average defense in CF.  The way he seemed to step his game up in the brief time in AA is a very good sign in my eyes.

I don't think you could go wrong with any of these players.  I'm sure alot of other teams wish they had talents like these in their system.

Just my two cents.

I think Upton will pick it up this year, but it might not be until the year after that people start to see how special this kid will be.

Remember he was learning a new position as well.