I don't know about jam packed with model kits... Everyone I ever hear says it's mostly RC and not a whole lot to pick from regarding models kits.
Best Hobby Shop Houston 2012 - M&M Hobby Center
Jam-packed with model kits and remote-controlled everything, M&M Hobby Shop would be overwhelming if it weren't so damned awesome. This place is a remote-control and model kit enthusiast's dream on steroids. And if you do get a little overcome by all the marvels inside, step outside and race a remote-controlled car on one of the mini tracks on the property.