I'm gutting my socket 478 machine and rebuilding it with a new X58, i7 intel 920 CPU.

I pretty much have the component bought ,and am only waiting to buy memory.

Here's my question:

I bought an Intel 920 when the local MicroCenter had them for $230 when I noticed last Tuesday (4/23) the prices jumped up $50-75.00.
I'm not an overclocker but may experiment with that with the Asus Rampage II Extreme Motherboard .
They make it super simple for novice overclockers...like yours truly.

I am a gamer to the extent that I bought my first nvidia product...the eVGA GeForce GTX 295 Video Card. (which doesn't really pertain to this question)
That was NOT cheap.
I could care less who kills who first in multiplayer.
I rarely win anyway!

If relevant: this is NOT a toy to me.
I conduct business on it too.

Memory I'm about to buy:

Either 6GB of Corsair Dominator ....with or without the fans..
TR3X6G1866C9DF with fan accessory about $250. (or)
Without fan: TR3X6G1866C7GTF for about $160
The summary of performance compatible Corsair memory is here:
http://corsair.com/corei7/default.aspx

The meat of this post, 2) fan questions:

1) Should I stay with the factory supplied Intel CPU fan, or buy (what I have come to believe is the best on the market), a Zalman aftermarket cooler?

2)And: Do I really need the Corsair memory with the top fan kit?

The price of this upgrade is killing me financially, so every 10 bucks I can save is a Good Deal.
I'd like to be able to use this for 4-5 years...with minor ugrades as they appear, and I have the $$.

But ....I wanna do it right the first time, and not get surprised down the road.

This is going into a Thermaltake Kandalf Super tower case, with plenty of space and fan cooling in the thing.

I'm still going to be running what I have: Windows XP Pro w/SP-3.
If I can skip Vista, fine.
I'm looking forward to Windows 7 and hope I can just jump right over Vista like I (fortunately) did Windows Me-stake.

Nothing special on the optical drives and I using a new WD VelociRaptor WD3000GLFS Internal 300GB Hard Drive.

Can't think of anything at this moment I missed to be able to reply.
If I did, sorry bout that.
Just ask.
I visit here.........often.

Opinions and advice much appreciated as always.

Steve_83