I was in exactly the same position - and eventually ponied up for the Filco Tenkeyless Brown. It's a lovely keyboard, no doubt.
My considerations were:
- price, like you say.
- layout - it's not absolutely necessary to have a UK, but I kind of like the large Enter, £-sign etc, but you can get used to other layouts.
- locality - basically the hassle of sending it back to an overseas supplier if you get a problem (or swallowing the loss).
- the fact that I was quite impatient at the time!
Weighing those things up - the other options I considered was the Noppoo Choc Mini and the PLU tenkeyless ones - they're available from various international sellers on ebay. I've been stung with VAT and import duty before when ordering stuff from overseas, and when you add that on to the ebay price, they don't work out that much cheaper - you might save about £30 over buying a Filco in the UK.
If I were buying again, I might go for the Noppoo, but I think it would be a close call.