Not sure how a bullpen discussion turned into a defensive infield discussion, but here are the numbers.
Morel is tough to gague because he's only had one season under his belt. But, in 126 games, he had a UZR/150 of 1.0 in 2011. Beltre from 2011 to 2009 had a UZR150, respectively, of: 17, 12.7, 21.2 (2009).
In the past three years, 2011 to 2009, Alexei has a UZR150 of: 11.4, 10.1, 3.2. Elvis: 6.9, 0.3, 13.5.
Beckham: 4.8 (2011), -1.2 (2010); Kinsler: 16.2 (2011), 4.1 (2010, only 103 games), 10.2 (2009)
PK: -1.1 (2011), -14.7 (2010), 2.1 (2009); Moreland: -20.7 (2011), -14.6 (2010).
So, from a glance, it appears as of 2011 PK is the better 1B, Kinsler the better 2B, Alexei the better SS, and Beltre the better 3B.
Obviously, this is just a snapshot of past years and not a measure of who you'd rather have going forward or anything.