Another I'm building a computer topic
No problem man. If you look at the bottom of the str8buy link I had earlier, they let you choose options. For like $12 you can upgrade to an Extremo 550 watt PSU. Or you could just buy the one you were going to and sell the 420 off like you said. Again, its your decision. I'm glad you were able to get that 9600 Pro, it's a far cry above a GF2 for games, and pretty solid for the money.
The RAM you picked out is fine. When you eventually pick up a second stick of that, you can enable dual-channel mode on your board and get a lil extra speed. Happy building, and if you have any more questions, feel free to ask away!
Reinhart: I might use some of their stuff (some of it is just silly or overkill), but that doesn't mean I'm going to pay for it. Besides, IMO a good looking computer with good parts doesn't need neon lights, its all just extra pretty. I'd rather take the money and have them go "You bastard, you've got an Athlon64 FX clocked at WHAT??" than have them say "Wow, that is one bright shiny clear acrylic computer! Hurts just to look at it. Oooh cigarette lighter, lets coat the inside of your PC with tar!!!" for the same money. 😀 But yeah, if I had lots of money I might be inclined to do a little of both. Their cooling kit is just silly though, if I wanted to go that far, I'd go watercooling. I'm happy with a good heatsink with a TMD fan right now though, and so is my wallet. Their cooling HD silencer looks a like the Zalman in design. Probably cheaper, don't know if its quite as effective, but probably gets the job done.
One thing about clear cases, I like them, but they don't conduct heat very well. I'd stick with metal for the time being, methinks.