Steinways draw a price premium, so check the casting marks that say Steinway, not just the silk screen paint on the wood. Silk screen can be counterfeited for ~$30.
The nineties Wurlitzer 40 had trouble playing soft, so play something soft and even like Moonlight Sonata movement one, and see how soft you can get without some notes not sounding. The seventies Wurlitzer 44 had no problem with this, and my 1941 Steinway 40 and 1982 Sohmer 39 dont.
Play every note, and even though out of tune, think about how it sounds and how you like that. My mother's 1953 Everett had a noticable tone difference between the 2 string and 3 string notes, that I didn't like on the 2 string side. The church 2006? Yamaha 44 has boring bass notes. I like my 1982 Sohmer 39 and my 1941 Steinway 40. both have clear 'bell like" top octave highs, very similar to what Steinway grands sound like on record. The latter two, I like the tone of the bass notes even though I know they are a beat frequency of higher tones, not actual 64 hz fundamental tones.
The seventies Wurlitzer 44 was boomier, had a lot of volume for filling a church full of wool suits, but not so much attack at the beginning as the two pianos I own. Yamahas consoles and studios I also find deficient in the attack loudness, but that is my taste.
I liked the tone of my 1982 Sohmer 39 more than the 1982 Steinway 44 console I tried at the store. But the Steinway 44 had faster action, and heavier action suitable for training a piano student to play grands in concert. The Sohmer I bought a had much lighter action, although the softs were repeatable and the speed was faster than anything I can do with one hand.
You can look at the pin block. My 1982 Sohmer has a 5 layer pin block and goes out of tune in less than a year on one note. The 1941 Steinway has a solid wood pin block, and after I got it stable in 2010, is beginning to need tuning again winter 2013. That is **** stable tuning, considering the temperature variation in my house from summer to winter.
Check that your dampers are even on let off, too, although that can be adjusted with a file.
Good luck.