E6750 Overclocking and Temps

I'm planing on building a new computer soon I'm fairly confident I will do an overclock on the ram and processor.

The system will be:
Antec P182 case
E6750
WD Caviar RE2 500GB
ZeroTherm BTF90
Gigabyte GA-P35-DS3P
XFX 8800GTS 320MB
Corsair 520W PSU (is this enough)
WD 160GB IDE HDD
Samsung SATA DVD Burner
NEC IDE DVD Burner

ram is yet to be decided but it will be 4gigs of 800MhZ
These are the potential RAM canidates I I'm looking at now.

Transcend AxeRAM 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Retail
http://www.newegg.com/Product/Prod [...] 6820208329

G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Retail
http://www.newegg.com/Product/Prod [...] 6820231098

SUPER TALENT 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Retail
http://www.newegg.com/Product/Prod [...] 6820609226

I was wondering what are same safe temperatures for the CPU?
I was looking around and it looks like I don't want it to go over 65C

I was thinking of doing 8x400 or 8x425 or maybe 8x450.
Would I be able to push the proc this high with no heat issues using the BTF90?
I was looking at reviews I know its a loud cooler thats ok. I also read it cools better than a Zalman 9500, and its more compact and not a heavy than most coolers that are better than it. I would be willing to go with a differnt cooler if I knew the weight of it and size wouldn't be a problem.

I was also wondering if I would have any heat problems with the Northbridge at 425 or 450 FSB?
How hot should the NB get?

I am confident that I can overclock with no problem even though I have never done it before, but I was a bit worried about heat.

One last thing will overclocking degrade the processor and cause it to have a shorter lifespan?