PBO is amazing. I've never been more happier about any feature EVER than I am with this.

I think the ISBoxer wizard doesn't see it because of how AMD register their CPU cores. An intel 8 core (with hyperthreading) CPU will display it as 0-15 cores/threads. AMD has it registered like THIS; as you can see it registers the cores 'Core #0 Thread #0 and Core #0 Thread #1' which probably confuses ISBoxer. I haven't really looked into it much if i'm honest.

Intel has been stagnant for quite some time. The refresh doesn't really bring anything new to the table barring the extra cores. Its good to wait and see how it all performs before committing to one thing or another; as always.. get the best deal for what you require
(and if you go the intel route.. PLEASE PLEASE do a custom WC loop for awesome OCing)