I love the figures like this, I'm not casting judgement upon whether they are good or bad to be honest, it's up to people to decide. I imagine there are some MPs that people will say don't do nearly enough work to justify the spending, and others that go above and beyond their relative cost.
This said, the House of Commons itself, including MPs and general running costs is expected to have cost the taxpayer £365,800,000 in 2006-07 (subject to final auditing etc). According to the Leader of the House, Jack Straw, this figure equates to a cost to the taxpayer of approximately £550,000 per member, per year.
Make of this what you will, I am merely the messenger.