Replacing Boilermate II / Potterton Suprima 70 with a Combi.

If I were to replace a Potterton Suprima 70 and Boilermate II setup with a new combination boiler with no separate water tank...

(1) Would I be able to keep the 8 existing radiators ? - They are in good condition and were bought with the above 9 years ago.

(2) If I could keep the radiators, would I have to get them powerflushed ?

(3) What pipework would be involved FROM the new combi bolier to feed the radiators - assuming I could keep them - would there be lots of new pipework needed ?

I know that these questions may seem simple but they're not to me and I don't want to ask a salesman - ahem - because they don't always give the most honest answer.

Also what power/make Combi should I be going for. There are 8 radiators, 1 hot water tap for kitchen sink, 1 hot water tap for basin and 1 hot water tap for bath in bathroom. No second bathrooms or shower.

1, Yes
2, Too right you should
3, a fair bit, as you will have to get the mains to the boiler and hot water to the taps, and the central heating will have to be reconfigured. Not too bad though