mind you, I don't think Bill's fiddles are quite within the price range we're talking about here...

something to bear in mind Jane - if you're talking of an upgrade of only a couple of hundred quid, old fiddles vary so much from one to another and depending on how well they're set up that you might find something you like better for the same money or cheaper than what you've already got, or you might fall in love with something that costs a lot more... it's such a personal thing!

have you had your fiddle set up professionally/recently though? My fiddle was sounding very scratchy a while back til I realised the bridge had tilted slightly. I moved it probabaly about a millimeter and it made a vast difference to the sound... Sound post positioning (not something I'd try and adjust myself) can also make a huge difference.

I hadn't realised that Gina was no longer doing the music room fiddle dept - but my recommendation would therefore be to contact her directly (as suggested by c.g.). She'd also be able to look at your own fiddle for you and make recommendations about getting the best sound out of it if you did change your mind and decide to keep it - she's done work for me on both my fiddle and viola and I've been extremely happy with the results every time.