I've come to the conclusion that the greddy is overall one of the best exhausts out there for the sr20, and I think it's fine except for the large tip. If I were to cut the tip off, and replace it with a smaller one, would it effect the noise, power, etc in any negative way?

The tip's just a tip, imo. It has more to do with looks that actually provide you with the noise and/or power factors. That is what the main part of the muffler does for you.

it will change the noise.

larger the tip the deeper the tone....

i tip is kinda big, but it the deep tone that it produces is great. if you want to see a couple of pic's of the greddy check my yahoo out.....http://photos.yahoo.com/tripnissan

It does not look that bad once you install it. How much can you get it for now-a-days? Still kind of pricy :(

If the tip is bothering you - just get a custom cat-back exhaust. DO NOT by any means modify the tip. It's the noise generator! (lol)

I might just have to go custom; its kind of hard for me to justify spending 500 for a muffler when i can buy intake/headers for the same amt