I would like to thank everyone for the advice so far.

I admit that a Gigastudio sample would provide by far the best piano sound. Nevertheless, many of the synth modules' piano samples are bigger than 2mb. I know that the Roland XV series Concert Grand card has 64mb of wave rom. I know that this still does not compare to 2gb.

But going the software route would require a computer, a good sound card, plus the purchase of the software. That would also be an eyesore for my wife.

A laptop with a sound card and a good sound font is a possibility.

I've heard very good reviews of the Kurzweil ME-1 synth module. It packs many of Kurzweil's best sounds including their Grand Piano into a rather minimalist kind of unit for people on a budget. It goes for $400. I think I'll purchase that as soon as I find a used one - or an outrageous deal.

Has anyone compared the Kurzweil ME-1 to the Roland XV-2020?

After I purchase a synth module, I will wait 2 or 3 years for today's newest software technology to be integrated into a synth module or a digital piano.

Beakybird