Just thought I would add my favourite waxes to the list. For years kept trying different ones then friend introduced me to the following and I never looked back. Yes they are expensive but they last about 3 years or so and I do lots of waxing!
I normally do 700 miles a week commute to work so these pay for themselves especially during winter and the dreaded salt!
Squirt a bit on a sponge wipe on and lasts for ages - yes you can use Turtle wax wet'n' dry also which is cheap but it does'nt last as long as this one does.