As much as it pains me to not use my 650E cB0, I am going to wait for the CUSL2 just cuz the SE6 sucks. I have heard that the new BIOS for the SE6 boosts up the speed 5-10% but I think that is pure speculation. I have yet to see any benches that prove this.
If you are currently without a computer, I would suggest you get something quickly but if you don't absoultely need to buy something NOW, you can wait a little longer can't you.