1. The eclipse gs-t (or gs-x) is better if you are looking to go faster without spending alot more money. to make each car run 13s, you will have to spend a couple thousand more on the gs-r. The eclipse gs however is not as fast as the integra gs-r. Keep in mind that the eclipse gs-x is a car that has many problems, i.e. transmission, etc.
2. the eclipse sucks as far as maintenance is concerned....It is a piece of crap, that was not manufactured well at all....quality wise....acura is a much better car, and will laster MUCH MUCH longer. Also, consider this....the eclipse engine (4g63) with turbo produces only about 25-30 more hp, than the integra engine (b18c) without turbo.
2. obd1 cars (etc. 94-95 gsr) do not have a governor, whereas the obd2 cars do.
3. contrary to popular believe, insuring a gs-r will only be about 20-40 $ more than insuring a regular LS