If you are new to all this, may I also suggest that you demo it somehow and also demo offerings from NAD and Marantz?
Unless you've got some big speakers and can play it loud, you may find it a little hollow and clinical sounding - I also own the 540a V2. Until I bi-amped with a power amplifier it didn't have anywhere near enough clout for my tastes, although the new speakers loosening up over time also help this I think.......
If you do like the Cambridge sound, it would also be worth finding the additional £50 for the 640a... a little more cash for much better amp. If you buy several items from a dealer, you may be able to get a discount on this price too..........