You'll be pleased to know they do exist. Here are some examples:
http://www.pixmania.co.uk/uk/uk/47/xx/xx/5/2/c riteresn.html
This is a minefield, both technical and price wise.
Go to a good store like Jessops where you can handle them and discuss them - get a feel for them and see what you can get for your money.
I suggest you buy one of the specialist magazines first - read the reviews, the terminology and so on.
I'm sure you'll have great fun when you do buy one.
Don't forget - the prices of these tend to fall, so don't feel pressured to buy one just because it's a 'bargain'.