Since you are only using it on your own vehicle, why not try out a few of the 30ml (panel pot) sizes. You can order a 2 pack, or a 6 pack. Even the small pots will do your vehicle multiple times. That way, you can decide for yourself what looks better.
If you buy the full size tub, you'll have it for a long time, whether you like it or not. Once you've decided what looks best to you, you can always order the full size.
Based on DDJ's recommendation, I'd try Light Fantastic and Diamond White. Light Fantastic is soft, Diamond White is harder. Not a lot of difference in application if you are doing it with an applicator. The look is very similar, if not identical.
My off white (cool vanilla) PT Cruiser looks the best to me with Light Fantastic.
If you like waxing frequently, a 2 pack of Light Fantastic and Rain Forest Rub would be a good starter pair. If you want a little more durability, the hard waxes are supposed to last longer. That would be Diamond White and Hard Candy.
When I first did the PT Cruiser, I did half of the tail gate with Light Fantastic, and the other half with Wolfgang Fuzion. I thought the Light Fantastic looked better when it was initially applied (more and deeper reflection) but after a few days both sides looked the same.
Depending on what you're willing to spend, many other waxes are also available in sample sizes.
You should also consider starting with a sealant rather than a wax. Wolfgang Deep Gloss Paint Sealant 3.0, Menzerna Power Lock, Blackfire Wet Diamond, etc. are all excellent products. You can put a topper of wax over the sealant. The sealants definitely last longer than wax.
Jim