Is there more impressive?

I've had nice results with turtle wax ultra gloss. I'm partial to zanio though, although its not a wax, its a polish.

THrow some hand glaze on it before you wax it...it adds a lot of depth and color to the paint

First let me clear something up 1st "throwing hand glaze on it" will give you more depth and shine BUT using a gaze under a paint sealant (NXT is a paint sealant [so is Ziano btw]) it will have bonding issues so it will not play well together......You want a good OTC wax look for Meg's #26 high tech yellow wax, if you want better order some ClearKote's Carnuba Moose Wax
http://www.specialtymotoring.com/clearkote.htm
If you want apply some Clearkotes Vanilla Moose hang glaze then some Clearkote Carnuba Moose Wax it WILL give you a stunning black pool of paint.......

The layering works really well. I use Meguiars #7 Glaze and then #26 wax. Great deep wet look shine that lasts fairly well even here in Florida. About 3 mos. and then I need to do it again.

I have also heard of doing the NXT wax and then a layer of a good carnuba on top of that, but I haven't tried it.