Touch of Thai is probably the best I've found so far in the Valley. Satay is the ultimate gauge of a Thai restaurant IMHO, if your satay sucks you've just tarnished my opinion of your entire establishment. Is it fair? Maybe so, maybe not but I got my standards!!
Theirs is pretty good, their noodle dishes (pad see u, pad kee mau, etc,) are also good choices. I am a big fan of spicy food and their menu does not disappoint in that regard when I specify that I like it HOT!!!
Have fun! And a Singha!