The "Cobra Ultimate Guzzler Waffle Weave Towels" from Autopia-carcare.com, Amazon and various other places are insane, literally the best micofiber drying towels I've found. I've just ordered a few more in fact. They are pricy though at between $15-$35 based on size but worth it. I'm sure they are showing up all over with different names right now so probably the same as what ibimmer is suggesting.
2013 F10 535i M-Sport, Sophisto Grau, 6-speed MT *for sale*
2011 E90 335i Sport, Jet Black, Sport Auto, Performance Edition
2002 E46 330i Sport, Jet Black, 5-speed MT, lots of upgrades *Sold*
2001 E46 330Ci Sport, Steel Grey, 5-speed MT *first love*