The IGP is just for when i'm 'between cards', not really a primary concern but just nice to have.
I'd be using a 4870 1GB in the mATX, and I don't like really going backwards with technology so i'd rather have a newer mobo with PCI-E 2.0.
As for i7, the launch soon is only going to be top end parts and full mobo's, won't be seeing any mATX or midrange etc stuff til end of Q1 next year at the very earliest. Not to mention the fact I really don't fancy blowing wads of cash on expensive DDR3 for very little gain.
Anywho, all input welcome, i've by no means made up my mind yet, just getting a feel for what is out as i've not really looked into the new G43/45 chipsets until just now.