Image by Davide Cassenti via FlickrBuying a piano is not something one should do on a whim, ha ha easy said than done but as a piano is an expensive item it would be wise to identify exactly the use the piano is going to get.
I have a friend who recently got a grand piano for his new Pad but guess what? He can not play, but he still love the look of the grand sitting their majestically in his living room. (but I am glad because I can play it when I visit him) makes a change than playing my digital piano at home.
But seriously you should take great care when buying a piano, for instance did you know the atmosphere plays havoc with a piano as does the air conditioning - Pianos are finely tuned instruments and will adapt to their environment but they hate moisture of any kind, also to much heat can warp them over time but fear not. A good piano dealer will be able to put your mind at rest.
My Recommendation is Peter Siow at Creative Piano.
Links to good free information.
Below are some good books about buying a piano and what to watch for.
The Piano Book: Buying & Owning a New or Used Piano
The Complete Idiot's Guide to Buying a Piano
Acoustic & Digital Piano Buyer: Supplement to The Piano Book (Acoustic & Digital Piano Buyer: The Definitive Guide to Buying New, Used & Restored Acoustic & Acous)
Tipbook Piano - The Complete Guide - Piano Buying, Piano Maintenance, and Piano Playing
Below are some links to other blogs and website for more information.