Not too good, you dont want triple channel ram for an AMD build, and depending on where you are buying from you may be able to get some combos on products. If you could fill out the form shown here we will be better able to help you http://www.tomshardware.com/forum/261222-31-build-advic...
Depending on the purpose, 6 GB is more than likely overkill.
If you wanted to play games with max settings at high resolutions, 4 GBs and that video card would be plenty...even for the foreseeable future. That said, if the difference in price (from 4 to 6) isn't much, go for it.
I don't upgrade much, the computer I replaced was an old P4 3.0 that I built with an 8x AGP ATI 9600 and 1 GB Ram. So that I don't have to upgrade again for a long while, I thought that 6 GB would last untill I decided that the system is to out of date to run the games I like (WoW, Oblivion and a few new games I will pick up that take advantage of my new build).
As for the IDE I see that now, and did change to Sata.
As for "not too good", is it just the 6 GB or is the whole system just crap? Please elaborate.
Most of it is good, but if you are buying from newegg make sure you check for combos, i saved 120 on my entire build through combos.
For better upgradability swap the PSU out for a 750TX, the 650TX cannot support 2 4890s but the 750TX can giving you a nice upgrade possibility for the future.
For now you dont get a benefit for games with more than 4GB of RAM. Try to get some 1333MHz or 1600MHz DDR3 ram with CL7, the lower the voltage the better but dont pay a ton for it, the $80 kit is just as good as the $100 kit with the same timings and voltages
^Exactly, you cannot run triple channel memory on an AMD motherboard, in other words, memory must be in pairs.
And I would go for the fastest quad I could afford if I was planning on keeping this a few years.
If the 955 BE really is only $16 more then it is totally worth it. It will let you keep the system a lot longer because when you hit a CPU bottleneck you can just get a decent aftermarket cooler and bump the multiplier.
While you can use a triple channel kit of ram on an AMD motherboard with no issues, it will run slower than if you had only two sticks because it goes back to single channel mode giving you only half the bandwidth you normally would have had.