So im in the 300-450 dollar price range. I'm thinking about a Fender Standard J-Bass or maybe the Standard P-Bass. I mainly play stuff like Incubus, Radiohead, RATM, etc..

suggestions are welcome!
I recommend them two, but also look at low-end Spectors, Warwicks (I'd try and skip Rockbass if your budget allows), mid-range Schecters.

Also, I do recommend having a look on the used market. There's a lot of bargains to be had with basses, but when your spending that much, make sure you try them out and do your homework (research!)