+1 for the Honeywell 907 / 927's... I put a 907 in my last place and it made a BIG difference to the comfort levels of the house and the heating bills!
For my new place, I've just ordered a couple of Heatmiser touchscreen thermostats (one for each heating zone), they can also be controlled via wifi / internet from my iPhone
http://www.heatmisershop.co.uk/therm...hw-ts-wifi-p99