Sound module recommendations needed.

[Denv12]

I'm about to buy a new sound module.Havent decided on which brand.Just want a good one for under $800 (Australian $).A new one,not 2nd hand.

My piano is a 2005 Roland RD700SX stage piano.I am specifically after pianos and electric piano sounds.I really would like a Fender Rhodes sound too.

I'm open to recommendations.What are you using?

I've seen a few:
Ketron KlaviPro
Ketron SD2 and SD1000.
Roland SD50

I'm a bit concerned that if I buy a Roland module I'll just end up with the the same electric piano sounds already on the RD700SX.

Thanks.