I have been trying to find some nice non-rice looking wheels for my del sol that are also fairly light. I found these, but they are only 15". I was hoping to get some 16x7.5 wheels, but these are the lightest I can find. So several questions:

Assuming this car is mainly for the commute to work, what give me the greatest rideand cornering improvement over the stock 14's?
How much do stock wheels typically weigh?
How much will this improve acceleration/fuel economy?
Does any one know of some 10 lb wheels other than those that are cheap?

Thanks, just looking for recommendations

Edit: links fixed