The stock clock means little, due to overclocking (actually only the K series really allows us to overclock at a 10 - 15 pounds price premium as far as is known currently).
BUT, the fact it clocks further and is faster clock for clock (aroud 15 percent) that could be worth it...
I think the boards are rumored to be about 100 pounds, and the chips between 160 and - 180... but if this is the case or not, who the heck knows.