@ Lebeau.
Excellent photos. I looked at panorama software about one year ago. I don't have the review anymore; according to the reviews, I read at the time, Autopano Pro is the best and probably the fastest processing software of the panorama stitching software on the market.
I assume that you live in Canada. Have you looked at the Merlin / Orion / Papywizard project on the Autopano forum? Apparently the head is available in the USA at a reasonable price. Unfortunately I live in Australia, the postage and handling costs will double the cost of the unit when shipped to Australia.