If you're thinking of a Grand Piano for a studio, don't get anything under 6'. Smaller grands simply don't have the tone compared to the larger ones. If you trry to record a 4'-11" or 5'-2" grand, you're going to be sorely dissapointed.
Baldwins are ok pianos, but unless you get get the concert size, they're really just living room pianos and not the best choice for a studio.
Stay away from Young Chang, Petrof, and Chickering. Unless the Chickering is a older model from the 1900's; the newer remakes are crap!
Kawai's are OK, but I don't like the action on them.
Bosendoffer's are awesome piano's but an entry level 6'- 7' is going to cost about $70,000. Maybe more.
I have a Boston 7'-2" semi concert grand. Boston's are Steinway's massed produced piano. Steinway's are hand made one at a time, much like a Rolls Royce. So the Boston is an excellent choice at a great price point. I paid $36,000 for my Boston, and it's Steinway counterpart would run upwards of $50,000.
I've seen used or antique Steinways go for less than $10,000, but nothing in the concert series/size.
Yamaha "C" series pianos are great pianos. A C7 would be a fantastic Grand for a studio. Sometimes you can find Yamaha "C" series pianos on what's known as the grey market.
These are pianos that were made in Japan, for the Japanese market. (Different finishes and lacquers for the American market.)
Usually, someone living abroad in Japan buys one of these pianos, and then comes back to the US and sells it. They're cheaper because there's no import taxes levied against it.
Be advised though, Yamaha's are Brite pianos, well suited for jazz and/or rock, but fall short when playing classical music because their tone isn't warm enough for classical music.
If you're going to buy a used piano, spend a 100 bucks and have a qualified technician look it over.
Honestly, I'd like to have 2 grands for the studio. The Boston I now have and
a Yamaha C7. That would cover a lot of bases!