Roach's is a bit pricey on what handguns they do have... And I wouldn't say they have a "good" selection.... it's pretty bare these days compared to FS or ZHA. But those guys are great though.
Collectors is fantastic.
And yes, on Thursdays, FS, Roach's, ZHA, Collectors... are all open until 8pm.
If I were you... I'd take off from work a bit early on Thursday... and hit up FS, Collectors, Roach's if you want, then down to ZHA.
Price-wise between the 4 shops... it's hard to beat FS... Collectors is a close second...
Having the best selection... FS and Collectors will have a great selection of the standard stuff... but ZHA will have the goodies that most other stores don't have.