Attached Link: http://www.moi3d.com/

That helps so not wanting to do characters sort of rules out some things for now. Since you like to use illustrator try out moment of inspiration.  I am supplying a link to their site too. Carrera has a very nice renderer its weakness is usually modeling so many carrera users use another program to model in. Carrera does have some nice spline tools so if you do like illustrator type of work then it will suit you for some things.

There are many different ways of working. Most like to have one program that does nearly everything. Many of these programs are quite expensive but if you want a cheaper powerful program now look at XSI and Lightwave. Both I think will be the same price sice you are a Carrera user you can get a competitive upgrade for Lightwave. (about 500$) Both of these programs are used for a lot of pro work and they are not some cheap program. With Maya costing 2000 dollars and Max costing close to 4000 dollars.

If you like to have a few seperate programs then stick with Carrera for now get an additional modeler. My personal workflow is geared tword character and organic modeling so I use Wings which is quite good and free. I render in PMG Messiah which is 300$ does rigging animation lots of effects really geared twords animation and character work.  If you want to try out wings we have a wings forum here and it is pretty active.

The wit of a misplaced ex-patriot.
I cheated on my metaphysics exam by looking into the soul of the person next to me.