We like a few places on City Walk - Nascar Café, Margaritaville, NBA City. Also, Mamma Della's at Portofino is supposed to be lovely (we haven't tried it though, just going on what I've read). We are hoping to try Churrascaria at City walk in October (it is an all-you-can-eat Brazilian steakhouse and gets great reviews).
For cheap and cheerful quick service, we love Panda Express (also at City Walk).
A 3-day park-to-park (hopping) ticket will set you back $165.95 each and a 3-day base ticket (no hopping) will cost you $147.95 each. Those prices are with
Undercover Tourist and include taxes and postage. They are very reliable, we use them a lot. You can get a 14-day ticket for around £120 each but if you are only going to have 3 days there for definite then I wouldn't bother with that.