For that much money you can buy a full Mugen twin loop exhaust, which is well desired. The entire system includes the headers, downpipe, mid section and the twin loop muffler. Here are a couple of videos of the Mugen exhaust on my vehicle.
I purchased the full Mugen twin loop exhaust for my 97 Prelude many years ago and I think it's the best exhaust for that particular car for overall sound, looks and performance. There are most likely better exhaust systems if one wants more power along with a tune. But one of the benefits that the Mugen exhaust has to offer is high quality craftsmanship. The welding is beautiful and everything fits perfectly on the Prelude, its straight bolt on/plug and play! It was easy to install and any mechanic can do it or you can even do it yourself if you have all of the tools.
I recommend GarageFive, Speed Syndicate, GearHeads or AJ Racing. They can order any exhaust system that you may be interested in and provide installation as well. Perhaps speak with one of their sales representatives and they can point you in the right direction.
If you want more input from other Prelude owners, check out preludepower.com as they have many resourceful threads loaded with information on many topics. It's a great website for Prelude enthusiasts. You may also wish to check out vancouverpreludeclub.net and hondaprelude.to
I will try to find and post some photos and hopefully finish one of the videos that I've been working on as the two that I currently have on my YouTube page are not of great quality. I believe my microphone settings were too high, thus all of the distortion in the audio.
Goodluck!
Cheers
Mike