Shipping Large Amp across Canadian Border?


I am thinking of purchasing a Simaudio Amp or Mono's. As most pieces offered on this site are in the U.S I would be cross border shipping. Any input as to the associated costs and problems would be appreciated (ie: Duty, ta xes) What is the best method for shipping, Postal Service ?, or is 100 lb.s too heavy?
telemarc
as i am canadian i can tell you this is a bad idea its better if you put it in the trunk drive accross the border and if the distance is to far ship the amp within the country. less problems less costly.
I bought an expensive pre that was shipped from a member in Canada, and had a heck of a time getting it through Customs. Took weeks and many phone calls.

Neal