Disklavier

I realize that (i) this is a Yamaha group and (ii) there have been 
threads in the past comparing disklavier to pianodisc. But the Mark IV 
and Opus 7 systems have now been out in the marketplace for some time 
now. I was set to purchase a C-2 with a Mark IV until visiting the 
pianodisc dealer on the weekend and demo'd the Opus 7, which is very 
impressive - particularly with its tablet computer that provides for a 
direct link to the internet. I think the consensus is that the Yamaha 
continues to be the industry leader, but the Opus 7 has given me real 
pause. This is a huge purchase and I do not want to make a huge 
mistake. Any advice would be most appreciated. Thanks.
Ron