Upgrade from 220pro CI to 250pro CI or 440pro CI

[AnKran]

Dear guys, 

I understand this has been handled in the one or the other way, but I could find any detailed opinion about that.

I own a 220pro CI and have the opportunity to a 250pro CI for a decent price. 

So what do you think would be the better way. 

1. Adding another 220pro to get 440
2. Selling 220pro to support funds for 250pro
3. Save the money and invest I to Music and concerts as the step up in both ways is not worth doing

To be known maybe.. I'm running my 220pro with Sonus Faber Olympica III and I'm really happy with that.. From time to time there is just a tendency to scratch the itch... And since I saw the 250, it's hard to stop thinking about that.. 

Thanks for answers..