Credit Cards get a bad rap, and for a once off situation like you describe you might be better off with a loan.
The upside to credit cards don't often get mentioned. I'll ignore the obvious upside of paying off each month and having access to basically free credit.
1. Once you have a credit card you are carrying in your pocket a pre-approved loan up to the credit limit. This has it's own dangers but the ability to get at that much credit without needing approval etc. is very valuable.
2. You can increase, decrease, or make lump sum repayments as you see fit. No need to get approval.
There are lots more benefits also.
Yes the APR can be high, but unless you really are permanently at your credit limit and constantly carrying a very high balance then it works out quite reasonable for the flexability it provides.
Personal loans are not exactly stunning value. You sometimes hear people getting caught up about 1% or 2% APR on quite small balances. they might only be saving a few quid a year. they could probably save more by shopping around when buying the things they buy on credit.
Anyway, back to your point....A loan is probably best, but if you think you can clear this in a few months, and you think you can handle the discipline needed for a Card, then I think a Credit Card shouldn't be discounted on the basis of being more expensive.
Whichever you get, say NO to payment protection.
-Rd