Chipsets what's the difference

[Alloneword]

OK i'm in the early stages of looking at upgrading my system and my first point of call is the chipset sid eof things having looked at wiki and intels site there seems very little between any of these chipsets except the PCI slots going walkies.
Z77, Z75, H77, Q77, Q75, B75

Not even Intel could bring out 6 chipsets and difference only being PCI slot missing, can anyone explain what the differences are? Or point me in the right direction for some decent reading explain why one chipset might be better then the other (Lanes etc)

Even using intel's compare feature is pretty US.

All1

 

[Alloneword]

OK thanks for the reply Armageus well despite my post in here i'm not into O/C.
I can rule out the B75 & Q77 for sure despite posting here i'm not in O/C but won't rule out Z77 or the Z75, my main requirements are future proof as possible, by that i mean PCIe x3 support but i also use a raid card (that need x4 min) so have to make sure there is enough on the board to cover that as well, no point in putting that in line only to run a x1.

Anyway have any comment on Q75 chipset


All1