Money will not allow a second console, especially this late in the lifecycle of the current consoles.
Driving games have lost an edge for me a number of years back, but I have been tempted by the F1 Mario Kart type game coming out. Borderlands 2 does look good, and I enjoyed Borderlands for about a week, then my interest just tailored off, I'll think on it.
I am playing other game campaigns, just not so much online with my mates (like your good selves

). Most of the games coming out I want to play don't really cater for online (AC3, Last of Us, Beyond 2 Souls, Lego LOTR).