Haven't used either, but from what I hear ALL the time is the Danny Walsh is the best, and he books up far in advance. If he is available on your date, I would move fast.
We are using Danny Walsh as well, he gets rave reviews. One of my bms used him and LOVED him. If it helps at all, we had to book him in May 09 for our oct 10 wedding since he gets booked so fast.
Re: DJ Feedback Needed!
I've seen stuff of Aaron Topfer on the Boston board. Check it out :-)