I know that when you get into the larger size rims with the lower profile tires, rim-bending is a very distinct and real possibility.
Here in Boston, I know the local VW guys all hate the Boston roads because of their bent rims. (although I say you live in major New England city, and youve got 17"+ rims, theyre gonna get bent). A friend of mine with a Jetta bent 2 of his stock 14" VW rims (the roads here are real crap). He's getting them straightened somewhere in NH.
Dont know what city your in, but if I had a Viggen, and I drove it the way I do usually, here in Boston, I would not be surprised at all if I had a bent rim. If you do a lot of highway driving, and you live in the south or something where theres no frost heaves, then maybe you could get away with it.
Do you remember any specific "event" at which time you might have bent 'em? i.e. up a curb, into a pothole, on the railroad tracks .
As far as replacements, the more open space in a design the more susceptible the rim will be to bending. Unfortunately thats the slickest look though, IMO.

Z~