Scott, you already have the Rally II's like you said. So restore them (pretty easy to do, just time consuming) all in all pretty cheap. Then add the tire of choice such as the Red Lines.

THEN, if possible, get the 17's you want, and you'll be able to completly change the look of your car in half an hour! I have the Smoothies on our Yukon, and if I would have seen the Foose Thrustar's before that, I would have gone that way! I saw them on the Impala they did on Overhaulin, with the center section is a natural finish, with the rim polished... and they were Awesome!
http://crews.rankmyride.com/data/shops//8/7/157//.medium/thrustar.jpg

Anyway, why not consider having the best of both worlds? Rally II's with Red Lines for shows, and 17" wheels with BFG's for week-end cruising? It's almost like having two cars!

Just my thoughts on this.

Brett - 67 Drop Top 455!
(I have 3 cars with two sets of wheels for each just this reason... Hope to do the bird at some point)