great post erica! I'm dying to go back to Valencia again! I travel there every 2-3 years and always try to discover something new. I have not yet had the pleasure of dining at Ca'Sento (our kids have always been a bit too young to enjoy a place like this). We should be able to go in the next year or so. I'd also like to try some of the tapas restaurants you mentioned.
Next time you go there, I'd definitely recommend LLOC de TAPES. I think you'd really enjoy it. It's the best tapas restaurant that I've been to so far.