New boiler needed - Combo Boiler for oil central heating/water

[BoredWithNames]

Hi all, does anyone have any experience with oil combo boilers? We've been quoted around £3k for a new boiler but I'd like to ensure we get a decent one.
Our current boiler is laying all over the kitchen floor in the kitchen and the new one needs to heat and provide hot water for a two-storey, three-bed house.

Any recommendations or thoughts appreciated.
TIA

I have Worcester Bosch... reasonably reliable. Expect at least one part to fail each year!
(I think oil boilers are the as reliable as gas but am not a plumber ).

We had our old (20 years) Grant combi oil boiler serviced last Friday. The guy that does it is 'good value'. I'd been asking him about a problem that seemed intermittent and he muttered something about a new boiler being a couple of grand. But I don't think that included fitting.
You need the correct capacity for the size of house/number of rads, so that would affect price.
What's wrong with your old boiler other than it's a bit of a jigsaw? Again when talking about our 20yr old Grant he said unless it was the heat exchanger or the actual 'big bit' burner? (can't remember what he called it!) then the parts are still available.
Make sure you're at least taking advice from someone who is OFTEC listed.