Extremely cool mate, but without a projector and screen it's a bit of a waste of time imo, 60 inch TV? Hell, i've got a 70 inch in my living room.
With a dedicated room like yours, surely a good quality 1080p projector and 100-120 inch screen is a must have, the bat cave nature of that garage would provide perfect conditions for getting great contrast and picture quality from even a sub £1000 unit, the Optoma HD200x can be bought new for £650 or the Epson EH-TW3200 for slightly more, both are highly regarded in the sub £1000 price bracket and would give an excellent image in a dedicated room.
If you are intending on adding a more expensive projector than the above 2 later on when funds allow then fair enough, ignore my rant.
http://www.expertreviews.co.uk/projectors/275452/optoma-themescene-hd200x
http://www.expertreviews.co.uk/projectors/1282222/epson-eh-tw3200
Sounds like your Mrs isn't entering into the spirit of things by not allowing a projector, talk her round mate and if that fails get one anyway, she ain't gonna divorce you over a projector. Bloody women!!!