We tend to ride the bonneville Americas and Speedmasters over the other derivatives. They are far more comfortable on longer hauls due to the seating and forward controls. But chose between a Thruxton and a T100? Pretty much the thruxton is more of a cafe style where the T100 is more standard bike style.
If you want a great deal on a Thruxton, Snekptp has one for sale very cheap in the classifieds.