I don't think the Konig Heliums come in an offset that would be legal for Stock class.
I agree with others who say the Kumho V710 is probably a good R-comp choice. They got good results in a recent test by Grassroots Motorsports. But for something cheaper, the Avon Tech R-A is also getting good comments. Probably has longer tread life, too. Now selling for $119 each in 205-50/15 from tirerack:
Avon Tech R-A
I plan to hold out for the Kumho's unless financial disaster strikes (i.e. April 15, 2008
). The idea of using 215's front and 205s rear is appealing. I'll be using the stock Sport wheels since I haven't been able to find anything else that satisfies the rules. I plan to weigh one as soon as I get them dismounted, but most reports put the weight around 17 pounds each, which isn't terrible, but not great either.
Fitless, I'd love to see a pic of your Valiant if you get a chance. I dig old-school autocrossers! What region are you racing in, BTW?