Check out Washburn guitars. I have a Washburn D42s, I got that guitar for £249. Wasburn's range from below your budget, right up to whatever you want to pay.
Thats just a little advice from me. I don't do technical advice. Allthumbs knows his stuff, so please take heed of his advice. Just make sure you are happy with what you buy, and please make sure the guitar has been set up correctly. Happy shopping.
http://www.washburn.com/products/acoustics/index.aspx