Wait envirofone have locked your price for 21 days?? I sold last Thursday and they emailed me today reminding me that the price is locked for 14 days. I was thinking about doing what you said buying the 8 then returning it near the very end of the refund period as to save time and money in case i wanted to go for the X. Still undecided but times ticking.
Well officially they've locked it in for 14 days. But you get an email after around 10 days where they offer to keep the quoted price for a further 7 days to help you make up your mind.
I feel bad buying and then returning, but to be honest, with the games Apple are playing with the UK pricing, I'm going to do it anyway.