A friend of mine had a stainless set of tips custom made at a sheet metal fab shop for his flowmasters. There are also many aftermarket tips you could put on, just make sure the diameter is the same. I dissagree that they look cheap. The flowmaster tips fit the cutout in the rear cover better than any that I've seen and they also tuck under the car the best plus they are by far the best performance value for the money imho. I painted mine black and welded all the connections for a cleaner look.
I just painted mine with some high temp paint and have since removed the clamps and had them welded . Also had the resonator removed and an H pipe installed . Sounds good to me with little resonance.