I use Lightwave. The modelling module is top notch. I also do all my UV mapping in LW .I can control precisely the position of every point on the map so I can easily match prints and plaids across seams. I cut up my body groups, and assign my materials also in LW and export to obj where that information is retained. I build in the body morphs practically at the beginning of the modeling process, since Lightwave's endomorphs permit you to add details to the base model that get transfered to all the morphs,it's easier to tweak 100 points than 400! To save the various body part morphs to obj I use DAZ's free export morphs to obj plug-in for LW 7.5 ( my many thanks to Daz for that freebie ). It's a little pricey, but with one of the best modeller around and a gorgeous rendering engine it's IMHO the best price/quality ratio, plus a large and generous community on the internet with lots of tutorials and informative user's forums. Just my 2 cents.

Dominique Digital Cats Media