I used to live in the Boston area, and whenever I'm back in town (every couple years or so), I like to drop by Hank Lee's Magic Factory. Last time I was in town, I believe their storefront was on South Street near downtown.
Ahhh, just checked their website
http://hanklee.com, and clicked on "Store Hours" to discover that they've moved to North Street in Medford (just north of Boston). It would also appear that they've cut their store hours from those of a normal shop to 1pm to 6pm, Wednesday through Saturday.
Still, a visit might be worthwhile for you. Last time I visited (about two years ago, I think), the fellow there showed me these cool cards called the "Ghost Deck", and that was the first I'd ever heard of Ellusionist, which in turn led to Theory11, etc. Who knows what you might learn while you're there?
(BTW, I don't think they carry E or T11; it was the guy's personal deck. But, the folks I've talked to there are knowledgable, working on their craft, etc.)