Dedicated Water Supply for Pumped Shower

[mako]

I have a combi boiler which supplies my hot water and central heating. I would really like to have a good power shower and am considering whether or not this is feasible (read affordable) as I am about to replace my double shower with a bath/shower.

In order to drive a dedicated pump I realise that I must feed hot & cold water from a tank supply. I am currently thinking along the lines of using an electrically heated storage tank of some kind and have come accross the 'opal' unit from Elson [url]www.elsonhotwater.co.uk[/url] which is also available as the 'twin storage' system. This includes a cold tank (115litres) and a hot tank 'opal' (upto 225litres).

Would this type of system work to drive a shower twin pump (Stuart Turner or similar)?

Is there anything else I should be aware of?

TIA

Dan