Disklavier

We went to a Yamaha "clearance" sale a few days ago.  We got the 
hard sell and bought a DGC1M4 for $22,300 "pending 3rd party 
approval" (my daughter's piano teacher).  That is, if this isn't a 
good deal, we can back out.  The teacher played the piano and said 
the piano itself is a nice one.  I have no doubt that this is a 
quality product, and judging from the prices listed in the "polls" 
section of this website, it doesn't look like we're overpaying 
(right)?  

I'm just not sure if we need "this much" piano, or whether another 
piano out there would be a better value for us.  No one in the 
family plays yet (my 9 year old daughter will begin lessons in the 
Fall).  On the other hand we're very into music (my kids already 
play the cello and guitar very well), and we're moving to a new 
house that has a whole-house audio system - the integration could be 
a lot of fun.

I would like to thank everyone who posted their prices on 
the "polls" section - that was very helpful to me.  If we actually 
commit to this piano, I'll post as well.

Any opinions or feedback?  Thanks so much!