Well... On the basis of the PP test (thanks Andy), and the gf having been to the shop to look at the actual thing, she has decided on the Canon. (that'll please some people that have posted in this thread

)
Next step: the purchase

Best price off the web (from places with a good rating from the likes of kelkoo) is £600 (Body and kit lens). Jacobs (we have one locally) is £630 according to their website. It doesn't say it's a web exclusive offer, so I'm presuming that's the physical shop price.
I think £30 more is not a great deal to pay for getting it from an actual shop where you can return the item and speak to a person in case something is/appears wrong, so that is tempting. The other benefit might be that we could flog off the old 35 mm kit as part exchange.
Questions:
Do Jacobs do part exchange?
Is a part exchange worthwhile given the following kit:
Pentax MZ-5 + kit lens (35-80)
Sigma 7-300 Zoom
Sigma EF-430 ST External Flash
p.s. I'm not interested in getting into Ebay to flog off the old kit.