Intel i7 860 memory?

Hi guys!
After doing about two weaks worth of research ive decided to buy an Intel i7 860 2.8 ghz with my new system build (most suited for me). I just have one problem:

Everywhere there is forum threads about these CPUs and their performance but i cant seem to find info about which memory to get with it...
The i7 860 is (from what ive read) not running tripple channel memory but rather the dual channel, still everyones talking about buying 2000 mhz tripple channel DDR3...
On intels webpage for the i7 860 ( http://ark.intel.com/Product.aspx?id=41316 ) it says i should use DDR3-1066/1333...

Lets not make a lifestory out of this  :

Should i go with:

1) Dual channel DDR2 low CL 800mhz (the i7 runs at 1333)
2) Single channel DDR3 medium CL 1333mhz (Found it cheap and im a cheap bastard)
3) Tripple channel DDR3 high CL 1333mhz (Plz dont choose number 3 xD)
4) Dual channel DDR3 high CL 1333mhz (expensive...)

And just to add to the questions, is 1333mhz the ultimate freq even if overclocking the CPU?

Thanks guys!