Until other manufacturers catch up with their ranges, the best two are going to be the Arcam AVR400 or Pioneer SCLX83. Onkyo and Marantz should also be considered.
With the Tannoy's I would strongly urge a listen to the Marantz SR7005. We have put the majority of Tannoy systems with that amp over the last few months. The LX83 was our previous recommendation but the Marantz just edges it on 2ch.
Yamaha's RX-V3067 is also worth a look as it works well with the Tannoy speakers 🙂 Or if you can wait another month or so then Yamaha's new Aventage range of AV receivers is due to be launched. The Aventage RX-A2010 at £1500 or if budget allows the RX-A3010 at £2000 look very promising and are also worth serious consideration