I'm not sure what is the most awesome, bad-ass, yet thoroughly practical vehicle - E63 wagon (with the backwards facing rear-seat option, of course!), or the CTS-V wagon. (I'm not going to consider an RS6 as it's not marketed here, but definitely fantastic too)
But back in the real world - while I'd love to have another reasonably-priced midsize wagon on the market, I can't imagine VW will offer another Passat wagon with the rumour of them building yet another CUV.