I don't have experience with those Tannoys, but Tannoy is a good brand, and the other Tannoy monitors I have used were very good. The Yamaha's are good too, I listened to them at the store, and came very close to buying a pair. I ended up getting Equator Audio's D5s, which I can highly recommend.
Really, all of these are good serviceable monitors. The biggest thing is going to be letting hem burn in for a little while, and listening to lots of familiar tracks on them, to give your brain a chance to learn their sound. Nothing can really replace spending time with the monitors.
Getting your room issues (if you have any) should be on your list, too. Some basic treatment can help a lot, in small rooms or very live rooms, especially.