I would back the accountancy stuff, Goodman Jones have been great (I've got Cetin Suleyman as my accountant there) and Xero is also fantastic. Additionally I bank with HSBC as they do an auto-sync to Xero and reconciliation of accounts can be made an incremental task that can be done in a few minutes.
I actually switched my banking to HSBC just for the Xero integration. I'm surprised more services haven't picked up on the potential of HSBCnet (the technology behind the integration) - I can see it being incredibly useful for all the mint.com clones in the UK.