Need some input on my next rig

Hey again, I made a post just like this one a couple days ago and got some really good advice. I changed things up a little bit so I didn't want to bump up the old topic. Here it is:

http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=6864509

It comes out to $845 after mail in rebates, combos, and promo codes (if I end up ordering it today while the Memorial day sales are still going on). Some questions:

Is the PSU (550 W and 18A on the two PCI-E connections) powerful enough ?

Will the RAM work with the given MOBO and CPU?

Thanks a lot,

take out the CPU zalman cooler and add this for the PSU and you are set.

I would change a few things (sorry if i bash some stuff a little). Firstly, the psu is crap. The efficiency is 72+ which is really weak. I would usually recommend a FSP psu, but considering the budget constraints, i would recommend this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139003

Then for the motherboard i would choose this one:

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128387

This MB supports all the types of AMD procs out at the moment (the AM3!) which is great. It's also a little cheaper then the one you choose.

Then to the topic of GPU'z. I am in dire need of a upgrade at the moment (i have a 8600GT) and have been looking at ATI cards, but theres always one things that turns me away; power consumption. A 4870 takes more then 300+ watts under load. I think thats ridiculous. (not that Nvidia cards do much better). So now i've been looking into the HD 4770 cards, which have a smaller proc (45nm) and consume much less energy. But since you choose a 4890 you probably want alot of performance, so a 4770 wouldn't cut it. So if i were you i would wait a few months for the 5000 line, which will sip less power, but then again all tech gets better if you wait. So whatever, i'm not being helpful, just needed to speak my mind.

But i know for sure that you should change the MB and PSU, and hope i helped

-Czech