A lot of people that go with the tascam love it. The reason I ended up purchasing it is because I read from a creditable person on DVX User that he ended up switching to it from the h4n. Plus I saved $100 or so on one.
I HIGHLY recommend buying this DVD and watching it. It has helped me a lot and you will learn a TON from it. I would not want to do any work where audio is important without having some knowledge and this dvd is perfect to learn from...