A good, big, microfiber waffle weave towel should do you good.
This is what I primarily use to dry my car.
http://www.detailedimage.com/DI-Microfiber-M13/Waffle-Weave-Drying-Towel-P100/36-x-24-S1/
Wash this with your other microfibers and air dry, I have had mine for over a year now and they still look and feel like they did after the first wash. An "equivalent" one from AutoZone or O'Reilys will run you a few bucks more. I'm sure there are cheaper ones out there, just gotta shop around. But this style of towel in general should be just fine.
To clear up the acronyms, DI is Detailed Image brand, and GSM is grams per square meter. It is used to describe the density or weight of a microfiber towel. The higher the number typically the more it can absorb and the softer it is.