Best Bonsai shops, gardens, museums in Boston area?

I'm interested in any suggestions for the best Bonsai shops, gardens, museums in Boston area? I will be out there for a few days for my wife to run the Boston marathon. We will be arriving the 15th of April and I would like to visit a couple of places Bonsai related while visiting. Any firsthand or secondhand opinions about must see Bonsai collections to check out?

New England Bonsai Gardens, www.nebonsai.com/
Bonsai West, www.bonsaiwest.com/
Arnold Arboretum, www.arboretum.harvard.edu/
They have the oldest bonsai collection in the US. I don't know how much of it you can see, since it is usually locked up. Call & ask.
Royal Bonsai Garden, www.royalbonsaigarden.com/
There, that should keep you busy.
With all that running around, you may not need the Marathon.
Iris

haha....thanks Iris

Suthin's Royal Bonsai Garden is only open by appointment so call ahead.

From his web site

Store Hours

May - December
By appointment only
Please call ahead

781-344-6358