Estimado Antonio -
I just returned from Jalisco and had a knockout paella valenciana at Tapas Barcelona in Puerto Vallarta, run by native Chicagoan William Carballo (this also gets my vote for the paella with the best view in the world, surpassing even the Parador de Ronda and Hotel Real in Santander, my other contenders). After studying in Seville, he helped Emilio Gervilla establish the menu at Emilio's in Hillside, and then worked at Cafe Iberico.
Carballo is still friendly with Emilio's and Cafe Iberico, and would undoubtedly be in love with Xni-Pec if we can detour him to you on his next trip. Failing having him cook a pan for you in-house, my suggestion would be to call Emilio's in Hillside and tell them you are a chef yourself with a particular interest in paella valenciana, and want to come in on a given night (since they need advance notice to prepare it in any case). Hopefully Emilio's staff can tell you when the ingredients are at their peak and give you some extra attention. I've always found them very open to special requests.
Emilio's
4100 W. Roosevelt Rd. Hillside, IL 60162
708.547.7177
One other thought: you can also check out the brand-new Mercat a la Planxa if you're downtown.
http://www.mercatchicago.com/
http://www.timeout.com/chicago/articles ... -la-planxa
It's getting wonderful reviews here. Paella was not on the opening menu (though other kinds of rice dishes and stews were), but I've heard a rumor that you can get paella if you order a day in advance.
Su discipulo,
Mateo