I do too, but I like thick microfiber drying towels. They actually have some decent ones at Pep Boys; the big Peak drying towels in green.
I have both Showroom and Pak Shak--I prefer the Pak Shak. Links Showroom FX - Detailing Products & Accessories http://www.pakshak.com/ultra-soft-waffle-weave-micro-fiber-towel-25x36-1.html
Showroom FX, Cobra Guzzler, Sonus Der Wunder... Are you using DRY towel to dry a car, or DAMP towel to dry a car? You should always use DAMP towel, as it is softer and absorbs better...I also suggest boiling them or run them through a steam cycle in your washer...