I would read the whole thread that KE4EST linked. A few of us are quite discerning and have gone to the trouble of properly aligning a T90. Two of us made some very detailed measurements, and over about the center 20-25 degrees they will outperform a 90 cm offset. A have three T90s, and they offer a number of advantages over a single motorized Ku dish. I don't know a current source in the US, but when there was it was still often cheaper to have one shipped from one of the European shops.
I read that thread with great interest. Thanks for pointing me in that direction. Those dish look pretty wild. I know a place that just had comcast installed. On his roof sits a few dishes that look like that T90. I am gonna have momma talk to them and see if anything comes of it. She went to school with all of his kids so we shall see.