Phenom II X3 build

You dont need the 3 x2 gig RAM kit . Thats a kit for intel i7 motherboards that use triple channel RAM . The board you have works best with a 2 x2 gb kit .

Check out anandtechs article on the patriot viper ddr3

Your motherboard can support crossfire with two ATI graphics cards . Arguably that makes a single ATI card your best option as it gives you an upgrade path . Most people never do this though , but it is worth considering .
If you stick with intel spend the $ you saved on RAM to buy a GTX 285 . Much the same but runs cooler and uses less power .

Asrock are a decent brand , but newegg has phenom/gigabyte and phenom/ASUS combos that may save some money . You probably dont need a board with 3 pci-e x 16 slots

I'm always skeptical when I see a site bundle it's "Best-Selling Gaming Case!" in a deep discount bargain.

I'm thinking - they must have ordered a TON and they're not selling. So I go looking for "the catch".
But in this instance - I can't find one. Looks like a genuine good deal.

JonnyGuru review of Antec CP-850 PSU

On the other hand its a lot more case and power supply than you actually need for your parts. They cost more than your CPU!! About 20% of your budget going to parts that don't make the PC FAST
Some alternatives: Antec Sonata III & EA 500 PSU $120 or Antec 300 case and Corsair 650TX PSU @ $130 after rebate

A good deal on a CPU cooler: Sunbeam Core-Contact Freezer CPU Cooler $30 after rebate
Review: Sunbeam Core-Contact cooler

You definitely shouldnt use 3 ram sticks in that mb . If you do it will be in single channel . Two [or 4] sticks can work in dual channel . Two is the best option .
All RAM is not created equal which is why I suggested you look at the article on anandtech . Ideally you want the lowest timings [ like 7-7-7-20 ] which is a measure of how long it takes for data to be found while its stored in the RAM . Lower is better .

Pity about the lack of AM3 combo's . That makes your mb look like an absolute bargain .

WR2 is right about your psu being overkill for a single gfx card rig. The 650 xt will be plenty .
IMO buy the highest quality case you can afford . They dont wear out , and you can always update whats inside them

I will consider the 2x2 kits with lower timings.

The only reason why the 850 is on the list is because of the combo with the antec 900, which says is free shipping for the case and power supply. Newegg doesnt offer free shipping with most cases so that combo doesnt look too bad. I'm still confused about the combo as i proceeded to checkout ewiz charged me for shipping, $38! I sent them an email about it.
hows this http://www.newegg.com/Product/Prod [...] 6817139006

Both the Corsair PSUs have free shipping from NewEgg.
From Buy.com you can get an Antec 300 for $60 tax and shipping included (to my zipcode)
Antec 900 under $110 shipped.

Are you getting free shipping from eWiz or was that a $38 "gotcha"?