Good pair of head Phones not alot of soud leakage and good bass, any ideas?

I currently have a pair of B&O ear buds and a pair of Sennheiser HD600’s and I love both. I want a pair of head phones from a good brand that are less then $100 and are not bad when hooked up to my iPod. I listen to a wide variety of music but have found that I mostly listen to rock various incarnations of techno and some Hip-Hop. Also I am taking suggestions for a reasonably priced headphone amp for my Sennnheisers.