Well, I've pre ordered my E6600 (only cost £220 for a retail ) and now I need to order the rest. However, my motherboard is proving to be a problem part. I know that I would like a Gigabyte and it will either be the DS3 or the DS4. However, do the extra features (2nd PCIe x16 slot, dual BIOS and heatpipe) on the DS4 really make much of a difference? Also, are the northbridge coolers available worth the effort of fitting and the (minimal) expense? Thanks in advance.