I just bought a 2010 XC60. The perelli scorpions that came with it are most likely only good for one more summer season. My plan was to get Bridgestone blizzaks for the stock rims and use them for my winters. I'm fixing to get 20" aftermarket rims for my summer wheels and was wondering if anyone can recommend good rubbers for them. I don't need the best of the best but something decent for my wife to drive our kids on. I'm also not concerned about noise because adjusting the radio volume can fix that issue.
Thanks for any input.

You didn't say what size tires you already have. So I looked:

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
235/65-17 6.0in 14.5in 29.0in 91.2in 695 0.0%
235/60-18 5.6in 14.6in 29.1in 91.4in 693 0.3%
235/55-19 5.1in 14.6in 29.2in 91.7in 691 0.5%
235/50-20 4.6in 14.6in 29.3in 91.9in 689 0.8%

I don't know why you want to go with 20 inch, except for the harsher ride due to the smaller side wall. Increasing radio noise to compensate for noisy tires is a poor excuse in my world, I like to hear what is wrong with my car or other cars approaching from behind, like cops and ambulances.
Bridgestone makes a very good all season that is also quiet.

As for getting 4 winter tires, sounds like a good plan. But, do not get wide tires that ride on top of the snow and ice, get something narrower like 205.
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My back feels better when I sit in a Volvo seat

Thanks for the input.

The rims that are on now are stock 18's with original 235/60R18 Pirelli scorpions. The tires need to be replaced soon and I don't have a set of winter rims or tires so I thought instead of buying black steelies, I would use the stock rims and swap out the scorpions for winter rubber.

When we were looking around for a good deal on a XC60, I came across a couple R-designs that had 20's on them and I thought they looked great. I didn't want to pay the extra money for a R-design and thought I'd get a regular T6 and buy bigger aftermarket wheels to save some money.
I have 2 850 T5-Rs as well. One has low profile tires with a small sidewall and the other has a smaller wheel with regular tires/bigger side wall. I don't find the ride is much different between the two cars but the low pros look much better.
My thought of getting 20's for summer wheels was pretty much based on how they look, thinking that the ride would not be that much different. I've never bought a Volvo as new as the XC60 (2010) before. All 3 other Volvos I've bought in the past were at least 15 years old. I figured we would have the XC60 for a long time so I'd spend a little more and make it look a little better.

I was only half serious about turning the radio up to block out wheel noise. Just trying to say that I'm not to concerned about wheel noise as long as performance and tread ware is good.