W.P.
I think that the technique & products that you use make more of a difference than the cost of the blowdryer. You need to use product(s) appropriate for your type of hair. I use an anti-frizz product (Bumble & Bumble DeFrizz) before blow drying. You should section your hair before drying with a big round brush; this helps you get the hair completely dry. If you have a powerful dryer (at least 1875 watts, I think), this takes less time to do. I have a Remington T-Studio Tourmaline dryer. It cost me $35, and it does a great job. I usually get 3 days out of a good home blowout. I can stretch it to 4 days if I use Rene Furterer Naturia dry (spray) shampoo. (Don't bother with the cheap dry shampoos. I've tried them all, and they're just terrible!) Good luck!