I've been using Meguiar's NXT Tech Wax for the last year and it seems to be a good product. At the last big car show Meguiar's had a product trailer and they had demos on their products. I was impressed with the Tech Wax with it's ease of use. Also, the Mequiar's Rep recommended that all Meguiar's products be applied with a DA polisher for maximum performance. I've applied the Tech Wax both ways, by hand and machine and the machine does give a better shine.
I use the NXT quick detailer between waxes and it helps the wax last longer.