Strange choice indeed! I think Tops is very overrated. I frequent another store up the road from Tops called T's--in my view, they have everything Tops has--only cleaner, more organized, cheaper, and with better customer service. I think Sundevil, also owned by Tops, should have won the best beer selection instead, with T's being a close second.
BEST BEER SELECTION Phoenix 2007 - Tops Liquor
First of all, the inventory is divided by regions and countries, so things are easy to find. The refrigerated section has a sizable selection of cold ones, and the list of kegs is impressive, too. And then there are the obscure brews harder-to-find stuff like Dogfish Head 120-Minute IPA that get the beer geeks riled up. But just because enthusiasts love Tops doesn't mean it's a pretentious place to buy brewski.
In truth, it's so laid-back here that the staff can seem indifferent at times, so you're on your own, buddy. Still, if you know what you're looking for (or are adventurous enough to take a chance on some unusual suds), Tops is the place to come.