Well i'm downloading the XSI mod tool for source. I might as well start to make custom models for my maps seeing as how i don't map like valve, and therefore can't use any of their models. It'll be a tough learning process to model for source, but i'll get through it i'm sure.

Then i'll slowly transition into source mapping. Trying to utilize the models I've made.

My first project: Age of empires II Inspired HL2DM map
Small little castle village, plenty of open room. Some hallways and corridors.

I need custom models for this because... well I'm not making every little detail out of brushes. Screw that.

I'm also downloading the Artist's Guide to XSI. It's a bunch of video tutorials (Totaling 1.7 GIG) Showing how to use a lot of the tools and such.
Can't tell you how much i'm looking forward to this.

EDIT

The Artist Guide is highly recommended!! Get it if you want to do anything with XSI