-- "Any idea if the GeForce ti 4600 supports the Dx9
-- features that HL2 is going to have? It's performing
-- well right now, but I have some spare cash and want
-- to fully enjoy HL-2 (contents AND graphics).
-- But if a new card is ONLY gonna get me a couple more
-- FPS, I don't want to bother. "
Well, the ti4600 is only DX8, so anything specific to DX9 you can't get. But I wouldn't think most visual stuff would be DX9, so I think it will still look great with that card, except no AA or AF.
The 9800pro is probably a good upgrade from the 4600. When you think about the AA and AF, even if the frames arn't much faster with 4xAA and 16xAF on at 1280*960, it still looks 100% better, you'll never go back to anyhting less.
Though I'd wait for the 9900pro at least. I had a Geforce 3, like I said in my last post, but I wanted to wait another generation or more after the ti4600 before upgrading, it just wasn't worth for the extra frames per second when the GF3 was good enough. Then suddently with the r300 with AA and AF, I couldn't resist.