I have the Roland XV-88 with the SRX-02 Concert Piano expansion card. Sounds fantastic and the keyboard action is great.
Word of caution - make sure if you buy and XV-88 to get it from a music store that will make repairs/replacements as painless as possible. The XV-88 is a new product and based on my experience has the possibility of some problems.
I will shortly be recieving my 3rd XV-88. The first unit I recieved didn't even power up. My current XV-88 is not responding to aftertouch from the keyboard. Luckily I bought the XV-88 from a local music store and they have made this experience as painless as possible.
In fact the music store is going to deliver to my door the 3rd unit now on order and pick up my current unit.
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Ken D