I have a TSR 27 and a TST 30 tour SR.
I love riding both of them. The TSR 30 is slightly lighter, slightly faster, has drop bars and lovely Campag silver bits on it as well as a Swift titanium saddle. It attracts lots of interest and many cyclists I meet think it’s gorgeous.
I agree with them.
The 27 also attracts lots of interest.
The TSR 27 definitely offers the smoother and more direct ride IMO. I think this must be due to the thicker wheels and tyres. I have Marathon Slicks on it (no longer available) which are 35-406 compared with the 28-406 Duranos on the TSR 30.
I find the dual drive gearing excellent although I have heard reports about reliability and difficulty over spares. So far the only issue I’ve had was a broken jockey wheel which was easily replaced.
You never miss a gear, the chain never comes off, you have 27 usable gears and a gear range of about 20 to 108 inches which is optimum IMHO.