I'm curious what you guys need the surface Pro power for, I've gotten by just fine with an Atom powered tablet and it runs whatever I throw at it. I owned a surface Pro for a couple of weeks and the concept intrigued me, but I found it a subpar tablet, too heavy, too thick, poor battery life, and poor scaling just made it awful, I hate to use such a strong word but I was pretty disappointed after all the excitement and waiting. I have no doubt that a Haswell surface Pro refresh made a bit lighter and thinner won't be an incredible machine that I will be first in line to buy, it's just that today's surface pro felt like too much of an alpha product.
As for the start button, you should try Classic Shell
http://www.classicshell.net/ . It's pretty darned good as a start button, and very customizable.