I will say one thing that is pretty kool. There are many web sites out there that sell rims that have an option to see the rims on a car. It will show a supra with the rims you choose. As far as looks go this is a great way to see what they will look like on your can before you buy them.
Other options you'll need to consider is the price (obviously). What do you want to pay for a set of rims? Also, if you are looking for weight reduction a racing rim that reduces the weight of the rims will help get that horse power to the road by reducing the amount of "turning" weight. (the lighter the rim the easier it will spin) If weight isn't the issue then you are pretty much open to appearance for any rim out there that will fit. As far as quality goes you may be on your own there but on those web sites many have reviews of the rims they offer on their web site so you can search through what other people have said about them. But as far as appearances go try to find a web site or 2 that have the option to see the rims on a supra. I unfortunatly do not have a web address for you but they are out there. All you have to do is search.