I have just been through the process of trying to find an inexpensive keyboard with a piano feel so here are my comments. I had a Casio WK500 which, as a long time piano player, I found almost impossible to play well when playing it like a piano. There are a number of keyboards with "semi-weighted" keys like the Casio Privia series which are much better but are a bit above your price range. I almost bought a Korg SP250 which has real weighted keys but it sells for about $600-$700. Eventually I bought a Yamaha CP33 which has weighted keys and a true piano feel but it sells for $999. I honestly don't think there is a keyboard out there with a piano feel that sells for $350. the manufacturers use a lot of different words to describe the feel of their keys but it must say "weighted" or at least "semi weighted" to approach a piano feel and even then you have to check the feek for yourself.

Tony