My +8 is fitted with a Librands system, with side exits, and it's glorious - not intrusive or harsh at low speeds, and the dog's danglies at higher revs. One feature to check for on any system you choose is how well the silencers tuck up under the wings - some systems are rather bulky, and reduce ground clearance.
EJS - if you are anywhere near my neck of the woods, you are welcome to listen to the system as fitted to my car, so feel free to PM me
