My BBSE kit sucked, but then it sucked on P55 for high mhz too, so its possible ive just got a crappy kit there. It barely did 2000mhz @ 8-9-8 on P55 and had to slam the timings to get 2133mhz prime stable on P67. Something like 9-11-10.

You dont get as much extra on BBSE kits compared to PSC, but if you start off with a great kit anyway then I would imagine theyre at least as good as the PSC kits.

I've not seen a PSC kit yet that wont hit 2200+ at decent timings, whereas people have had issues with BBSE.

Bios updates may help that - its very much manufacturer dependant.

To get the best out your kits the following works pretty well:

For BBSE you only want either Gigabyte or ROG.
For true Hypers you want Gigabyte, foxconn, evga or ROG.
For PSC you want Asus mainstream or asrock.