Would you replace a combo boiler?

[indiegrrl]

Worcester Bosch 29cci. No problems. Just wondered if we should be replacing with condensing boiler as we hear so much about them being efficient? There are two of us; we don't use much hot water (no bath) and we don't have fires, just radiators.

It's going to cost between £1600-£2400 for a new boiler, so would only replace if it's really old (and parts are becoming obsolete) or your gas bills are really high. How old is your boiler by the way?