I was lucky enough to have the chance to drive an example of the "official" URCM car - the Rover 620 ti this weekend.
Found it comfortable and very quick to accelerate, in many ways similar to my old Dedra Turbo but with far less turbo lag and no discernible turbo spool up sound. In fact it hid the fact it was a turbo very well (looked under the bonnet and sure enough, there was a turbo there).
However, the steering has that horrible over-assistedness common to all Honda Rovers. As the power steering pump is operated off a pulley, would it be possible to gear this differently in order to assist the steering less? I found the steering to be the most off-putting thing about the Ti - that and the cheapness of the interior.