You won't regret getting a Clavinova. but a word of warning...
I recently bought one and almost immediately settled into hours of practicing while wearing earphones. Ended up with a whopping case of tinnitus - ringing (or noise) in the ears. I asked the sales rep about this matter before I bought, and he assured me there was no danger. Right.
What seemes to happen is, you've got those earphones very close to your eardrums. The sound waves, particularly those in the higher frequencies have considerable energy,
even when you have the volume set to very low (as I did). Those waves hit your ears and can wreak havoc.
So, I suggest yoiu don't even buy earphones. You control the volume just like a radio. Turn it way down if someone's sleeping, or you're practicing scales or anything else that might bother your house mates - or even your neighbors.
My wife hits the sack around 9pm. I can keep on hacking away. The piano's in the living room, just down the hall, yet, she hears nothing.
As for the sound...
It's very good in my estimation. (I have a CLP 270.) Add to that, the features that enable you to practice more efficiently than you can on an acoustic piano, and you'll never regret owning a Clavinova. Later, when your ship comes in, you can buy that Imperial Bosendorfer you've been slavoring for.
BTW, C.C. Chang, author of Fundamentals of Piano Practice, owns a Steinway and a digital piano. He told me he doesn't play the Steinway anymore. That might be an exaggeration on his part for all I know, but I'm certain he's happy with his digital. Fact is, he urged me to buy one. So I did.
If you follow suit, I hope you love yours as well.