I use both Max and Maya and love them both.. but in my opinion, and as a 3D architectual designer and modeler for a company, I suggest you learn in Max..

..its used more in the industry. Not that maya cant make great interior/exterior works, it can. I just know that when looking on craigslist.com for freelance work for extra cash, I notice everyone looks for Max/vray/Photoshop experience.

Just something to take into consideration

(Look at cgarchitect.com for alot of information for this also. They have great tuts for building interior/exterior shots and also lighting tutorials for both vray and using regular lighting.)