I'll be in Austin next week and am planning an informal dinner with some work colleagues. We're staying at the Driskill and would like to eat at a restaurant within walking distance that takes reservations for parties of 6 or more. Both casual and upscale (within reason) are OK. Since many of the people I'm traveling with have never been to Austin, I'm sure they would appreciate eating what Austin is known for - good brisket and mexican (preferably interior mexican). The meeting has an environmental theme so restaurants/chefs dedicated to local and/or organic ingredients are a bonus. I've been to Austin about five times in my life and my favorites are Curra's, Sam's, Rudy's and Taco Xpress. Unfortunately, all of these places are not within walking distance and a little divey for a business dinner.
I've searched the board a little and would like your opinion on the following options and any other recommendations.
Manuel's (downtown location)