There is absolutely no better 'virtual' controller/keyboard than Kawai VPC for the money ! It is a complete package in itself.
However, its always good to look at options. Some are - Nord Piano 2 , Kawai MP 11 , Roland RD800 .
If you are gigging, go for the Nord as getting out with a 40 lbs keyboard isnt always fun !
I am sorry to have not quoted the prices here, as these instruments arent readily available in my country. You can do a google check for more .
Have fun choosing !