Need Help! X-Pipe Question

I need help here guys! I have bought a Magnaflow Magnapack Catback exhaust system. I am looking for an X-pipe and need to know which would go best. I fouud one on ebay.. >>> http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33630&item=2461917933

There are also MAC o/r pipes for sale on there too. OR... which x-pipe would be best.

Thanks~

Tiffany