Syborg1211:
The 815E Pro will definitely fit the Alphas fine, because there are PLENTY of space around the socket. The CUSL2 is all crammed together with lots of capacitors around the socket which Im afraid you wont be able to get some large heatsinks on.
And to counter Midnight's comments, yes you'll have to open your case, same thing with CUSL2, everybody has got to open their case when they build their machine. And its not like you have to change your clock speed in a daily basis so blaming the jumpers is just a mood point. Most people get the clock speed set right after they finish building their system, and thats when you overclock, you find a comfortable clock speed, and you leave it at that. To get 133MHz and above on the 815E Pro, you only have to change the jumper once, everything from 133-166MHz will be enabled to choose from, which is absolutley ideal. If you have a 700E, your target range will be from 133MHz-145MHz, since you arent going below 133MHz(if you are then your 700E is not a good OCer), you wont have to change the jumpers at all.
Many people get confused when they blame the 815E Pro for the jumpers, I suggest them to try it out before bashing it. There is one more feature Midnight left out, the FuzzyLogicIII, you can let the guy do all the overclocking for you, no such thing from Asus.