So I got my car up and running last night, and I'm hell bent on doing some simple mods. It may be an Esi, but I want it to look and sound nice goddammit.

I scored a cheap Short Ram Intake off ebay (about five minutes ago) which can be seen here:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&_trksid=p4340.m748&item=130578817362&viewitem=&_trkparms=clkid%3D2895082600954058858

I'm aware the stock filter will be a POS and the HP increase claims are likely horse sh!t. But everything I've read said a cheap pipe is fine, so long as you throw a good K&N or AEM filter on it. What size filter should I be looking for, has anyone here done this?

Also, I've been doing some reading on eBay Cheapo stainless steel cat back exhaust systems and most people seem to agree they're a good bang for your buck. Does anyone have a recommended seller or a specific one I should consider? any personal experience with this?