Best Pho - Pho Saigon Noodlehouse at China Town in N. LamarPho - Pho Huang (Burnet or Round Rock)
Best Tortilla Soup - Baby A's (Arboretumville) at Stonelake
Best Hot and Sour Soup - Din Ho Chinese BBQ near 183 & Ohlen Originally Posted by Klepton
Tortilla - Monument Cafe in GTown -- Worth the drive!
There's a Thai place in Cedar Park (of all places) that has great Thai soups, but hands down the best Tom Yum is at Little China on N Metric.
And don't forget Whole Foods. A number of great soups.