If you can get into your local
Makro it would be worth looking at what they have. They have quite a large selection and the returns policy is really good. We have also found that their 3 year warranty for £40 - £60 for small screens worth considering.
I don't know whether these TVs are any good but , as an example, they have these on promo this month :-
22" Akura (HD ready, Freeveiw, built in DVD) for app £235(inc vat)
19" Goodmans (HD ready, Freeveiw) for app £200