thanks very much for your suggestion but i don't want to pay in swiss francs. unfortunately the SFr just seems to get stronger and stronger against the Pounds so i don't think it is worth the FX risk (between the time of placing the order and eventual delivery). also, i don't think switzerland has the lowest base price for a 997. i checked porsche websites around europe and i actually think germany has the lowest price (plus in germany, i understand it's cheaper to pay the local price including 16% german sales tax rather than buying a tax-free export and then paying 17.5% VAT in the UK). [if anyone else here knows otherwise, please let me know]. furthermore, i wonder whether the waiting list in germany is shorter than in the UK? [does anybody have an idea about this?] also i think that it's less difficult to get a discount if there are more dealers competing with each other. sadly in some EU countries (e.g. Belgium, Netherlands, Finland, Norway to name just a few) i just think there are too few Porsche dealers in any particular province/city of some EU countries so they don't have enough competition to enable buyers to squeeze a discount out of them.
i have bought 2 BMWs and a Mercedes Benz from Belgium and Netherlands previously for myself and my other family members and we saved over 20-25% on each car compared to UK prices. i'm not in the car business - just like to look around for a good deal!
my experience (for what it's worth) is not to buy from dealers in major cities. i got over 50 quotations from BMW and Mercedes dealers and found the small dealers in small towns/villages were usually more prepared to make a better deal. sometimes, they are prepared to make less profit per vehicle because it helps them to boost the total number of sales they make per month which enables them to ask for a higher monthly quota of vehicles from the manufacturer's subsidiary in their country. they need to use their quotas also to keep on to them.
i remember picking up my new BMW in a tiny Belgian town - but they were very professional, very polite and did an excellent job. some of these dealers are in countries where the local taxes are so cripplingly high that they really depend on customers from abroad (e.g. UK) buying tax-free exports. i get the impression that is also true of the Porsche dealer in Finland which even publishes its own tax free price list in euros in English! the Porsche website in Finland can even be viewed in English

if anybody can enlighten me further about their experiences of buying a Porsche cross-border within the EU, i would be glad to hear your story. thanks.