Hi...going to San Antonio June 8th-12th. Will be staying at St. Anthony and looking for best hamburger in the Riverwalk area. I am not interested in driving anywhere, so i want it to be within walking distance. Yes, i've read many times that dining in the Riverwalk area is overpriced and not the best that SA has to offer, but at this time i am only interested in the best hamburger (upscale, cheap, whatever) WITHIN the Riverwalk area...thanks! Also, recommendation for most romantic patio dining in the same area would be appreciated.