Interesting. I now actually have a gfx card that can run HL2 properly, got a good discount on a GEFORCE 6200, and seeing as my FX5200 failed, I had no other choice. So far, I can run a lot more games now, that I could run before. So I'm happy that they will run, even if they are on super low settings and only give me 15 fps.
The source engine is awesome in its backwards compatibility. I also believe it has a fairly decent physics engine. That being said I have never tested the full capabilities of the engine. I have however played half life 2 (the demo) and portal in the past on other computers, and it seemed ok. But if you're gonna to buy a game engine license like that, you should really have a big team to work with lest your money go to waste.
Semi offtopic: I'm looking for mapping courses... I've been trying to make good maps that can easily connect to each other (as if they were part of a giant continent that has been cut up into sectors), but I seem to do fairly terrible at that.
I understand mapping tools differ from one to another, but I'm sure there are some general concepts that I will find useful studying.
Nothing to see here, move along.