I would pick 3" regular tube or 4" rolled edge with resonators. (I personally have the 4" rolled edge, resonator, circular end - check out the pic). They should give nice volume without ricing it out.
Personally, I think a circular looks better with our body style. Since the back is more rounded, it just goes better. But I can see where kawik is coming from: angled tips look great on a New Edge!
Mufflers will give you the greatest change in volume - so what'd ya pick?

And realistically, tips are a dime-a-dozen in the auto stores, so you could always add later...
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YELLOW JACKET = 1998 Chrome Yellow V6
POWER: BBK CAI, TB, UDPs; Bosch Platinum +4 plugs
BEAUTY: black projector headlights, taillights, and mesh grille; 5% tint; shorty antenna; interior billet
ROLLERS: XXR 006 black spoke with blue lip; 18x8.5 & 9.5; BFG KDW/2 245/40R18 & 275/35R18
DRIVER: Jonathan, 6'2, 190 lbs
RIDER: my wife, 5'4 brunette hottie

and my 1st baby on the way...
