My first choice was going to be the Mad Force as well. I already own the TMaxx.
In spite of seeing the new 2.5 run I still wanted a big block. Checked out the Savage and the Mad Force and went Savage. I just think its a lot beefier than the Force although I think the Force would take it in a straight away race.
Another truck you may want to consider, although pricey, is the new Dominator. BIG as can be and the reports from the field put it up there with the rest. Chazey, on this site, has one and should be able to lend some input. He runs with probably one of the largest monster truck gatherings out there so he could prob lend a good comparrison.
Chazey?!?!?!