I believe his 151. The high end MacBook Pros (even the 17") use an 85W power adapter, and people can use the computer with that plugged in without draining the battery, so that shows they are using 85W or less. I suspect most laptops draw much less than that. My old Powerbook 15" uses something like 30W.
Oddly, for my current system (E7300, Gigabyte P45, 9500GT), Antec's PSU calculator suggests about 330 Watts. This is with the Atec PSU calculator. I'm sure there is a whole lot of back story there, but that's not my point.
Our OP's "system spec" button fails to "boot", or "load" if you prefer. So, that sort of renders this topic theoretical, or perhaps philosophical, at least with respect to his current system. Here again, your choice.
I will go on record as "staying the course" with my original assessment that almost nobody needs a PSU capable of delivering 700 >>honest<< watts :wave:
As an afterthought, I'm also sure that his choice of new case doesn't add to the PSU requirements....
Was the "rolleyes" enough, or should I also say, "just joking"?
Adden-dumb: I just plugged in the OPs dream system into the Antec PSU calculator, I came up with 295 watts. does that seem reasonable? Since our OP DIDN'T include a HDD, I put in 1 of each, IDE and SATA. So sue me for the 15 watt error.