the 5700 is a very good camera. it is a bridge camera, more functions than a compact but not as much as an SLR. it is easier to use than an SLR, i had an s5600 before i got my D50.
it depends how far u wanna take things, i bought the s5600 thinking i wouldnt want to start buying lenses and the like... i was wrong, hence selling the s5600 and buying the D50, and buying more bits for it!
I got the s6500 back in may and can say im more than impressed with the way it handles. I would imagine that the s5700 is very similar but with an enhanced pixel count. For £117 its a bargain, and if your a beginner its a perfect type of camera to start on, the program mode allows you to vary shutter speed/aperture whilst still retaining a decently exposed shot.
If you feel like going more pro, you can do as arc suggested and sell it for a DSLR.
Check ebuyer.com and pixmania.co.uk for prices, as well as Currys and Dixons (on Dixons enter birthday as a discount dode and get 10% off) and as many other places as you can think of. Also play.com and amazon.co.uk.