Best in ear headphones?

What are everyone's favorite in ear headphones? Ive looked at the websites for AKG and Sennheiser and they seem to have a good selection Im wondering if anyone has tried on both brands and which are better. Also the dr dre tours are supposed to be nice but overpriced for the quality. Anywways just wondering people opinions on the three and also if anyone knows what stores carry all these to try on? Im thinking best buy but Im not sure. Thanks