The main problem is lot of unknowns. The only thing that is known for sure is that Intel do not plan to launch midbudget / mainstream Nehlam architecture CPUs this year.
That will come much later in 2009. So at launch you wont get anything for even 20k.
Second slightly known thing is that Intel has dumped conventional FSB and the way CPU is closked. The Chip itself has very very high multipliers and FSB is direct which is not like anything we see today. I still dont know how memory will clock with respect to all this. Rest we will know soon.