I think multitimbral is kind of overrated, honestly, especially when you're just going to resample it. It really depends, though. The way the MnM does it is great because the voices can interact with each other through routing and/or track trigs. Most synths I've used do multitimbral like it's just 4 synths in one box.
I think it comes down to style and taste. If you have more orchestral, maximal leanings then multitimbral makes more sense. For the more minimal, techno minded, multitimbral synths can feel priggish, awkward, and detached. That said, I still fantasize about pairing my OT with an NL2 because it seems so immediate, and the drum kit mode seems fantastic - that's my kind of multitimbral.