But if it's not at a slant, it won't be mad awesome jDm man!

Well, the N1 styles of mufflers are supposed to be at an angle. I've seen a number of Eclipses with N1 style exhausts and they don't look too bad in my opinion. Everybody has their own style/taste though, so go with what you want most. The straight exhausts look good on the Eclipses too. The one thing I will say is that, the straight, more stock style looking exhausts will probably garner less attention from the cops. Sound output is always a concern too, when it comes to drawing attention from them.