A quick ESPN stat search confirms what I already knew.
If you are looking for the staff that racks up K's, you've got to get the Cubs. They've led all of baseball in team K's for the past 4 seasons, and while they aren't the best at minimizing BB's, there's still a healthy differential. An improved leadoff hitter should bring some more runs and bolstered bullpen should help turn some of those L's and ND's into W's, at least I'm hoping so.
Brewers aren't a bad pick either, they were #2 in K's last year. If Clemens does come back, Houston should be considered as well.
Minnesota doesn't strike out or walk near as many the others teams I mentioned. Last season, they had 965 K's with 348 BB's, for a difference of 617. The Cubs on the other hand 1256 and 576, difference of 680.
I'd definately make the Cubs my primary target, but none of those other 3 should be bad picks.