Ahh memory prices!/good memory?

Well, I am thinking about building a new system for overclocking, and I know that I need some good ram...
So I decided on this...
http://www.newegg.com/app/viewProductDesc.asp?description=20-145-420&depa=0
But AHH the price!
I remember seeing this for $100 a few months ago, the price is actually better now than it was a few days ago (was $161) but still...
Anyways, I found some cheaper place to buy the same memory, and a reseller rateing that nearelly matches newegg's. What I really want to know is 2 things...
1. Think this is some good overclocking memory?

2. I was wanting 2 sticks of 512, and I am assuming I need 2 sticks to run in dual channel mode? Could someone explain/link me to info about dual channel mode?

3. Any comments/suggestions?

I dont know that much about that memory but two sticks of that will run dual channel fine.

Why not pay a bit more and get the Mushkin PC3200 222 Special ? It's BH-6.

I always thought that Corsair was better

And what is BH-6? Sorry not up-to-date on memory, my mind is still back in old PC133 days...

bh6 is a chip made by winbond which will be able to run tight timing @ stock vdimm or tight timing and fast speed if run @ 3v+

Well now I am stuck between this...
http://www.newegg.com/app/ViewProductDesc.asp?description=20-145-420&depa=1
Price keeps comming down

And something else, are there any other suggestions that are same price/cheaper than this that do the same or better?

Thanks.
EDIT...
http://www.newegg.com/app/ViewProductDesc.asp?description=20-144-607&depa=1
? 3D game man says he got it to 480mhz (the 256mb version, 512 same specs)