Hahaha! I think that the problem with Volvo is that their base cars have terrible looking rims, while their top cars have awesome looking rims. It seems like there is no middle ground.
The S60 T5 18" Nebula and 17" Tethys, V70 T5 17" Amalthea, S80 T6 18" Capella and 17" Arrakis, S40/V50 Crater 16" and Cyber 16", C70 T5 Triton 18", Comet 17", and Canisto 17" are all beautifully designed wheels.
This is one of my favorites for sure: The 7.5 x 17 Comet in silver. Perfect for showing off some crossdrilled/vented discs and painted calipers.
-Drew