Welcome to the forum; lots of good info and help not to mention the social aspect of conversing with other Volvo owners.
High School - I think I remember High School.
If you are going to keep the stock wheels I would paint them the silver again or maybe a few shades darker.
Refinishing aluminum wheels can be tricky to make it look right if the damage is fairly deep - but cleaning them up will of course help.
I can understand funds, and 18 or 19 inch wheels can get pricy all on their own and especially when it comes time to replace the tires.
So if you have decent tread left clean up your rims and save up some cash.
I am a wee bit older than you and have a family with 3 teenage boys so money is an issue for me too most of the time and because I have a wife who really isn't into me spending money on my cars... She thinks things like cloths and food for the boys is more important. Whatever!
But I had to upgrade to different wheels - Every S60 in my area had the same wheels you have; I had to look a little different.
I went to Tire rack and bought some 17" wheels and tires = Around $900 bucks delivered.
Only $100 per wheel and about the same for the rubber.
http://www.tirerack.com/wheels/resu...lse&filterNew=All&filterWeight=All&sort=Price
So if you have decent tread left clean up your wheels run them for a while and save up some cash.
You don't have to buy the most expensive wheels to change the way your car looks.
I also took my old rims (Two were toast) to my local salvage yard and got about $80 bucks for them as scrap. (Maybe I could have sold them for more but I just wanted them gone)
My BBS style knockoffs - and IMO I think they look good -
Enjoy the new ride.