XSI is the coolest one, just load up XSI trial and diddle around in it for a couple hours, you’ll see what I mean. It’s incredibly obvious that XSI is very thought out in every aspect. They didn’t just throw on a bunch of new features in a fidgity UI system like maya. They didn’t tack on new functionality to archaic backbones like Max. They didn’t cut corners on things like Modo. There not trying to compensate for lack of quality application with a plethora of presets and pre-made content. It’s just XSI, right there, clean, simple, obvious and well thought out for the individual end user.
I really haven’t been as impressed with the slickness of an app since I switched from max 4 to maya 4.5. Really, XSI just being cool is why I’m going with it. Theres features in the new maya that kind of lean me that way, but then when I think about just how slick XSI is in comparison, it’s really no question to me XSI is the way to go.
Zbrush is a little cooler than XSI though.
Tutorials are a little difficult to come by just now, but Digital-Tutors has some nice ones if you’ve got the money for it (aside: 