Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

If building new and not using old socket 775 motherboard, then you should only consider i3 530 (£100)/i5 750 (£150)/i7 920 (£220)- choose the one that suit your requirements (may it be gaming, graphic works, or video encoding etc) and budget the most.
The i5 750 is very good and much better, however the rest of the i5 range are dual core with HT and aren't worth it imo.
That sig is enormous![]()

The basic i3 (forget the model number) is faster than a Q6600.
What is a Q6660?