accualy pysical modeling is great when combined with analog\sub atractive and additive synthesis to creat weird and wild sounds,i dont think there is much point to try and mimic acustic sounds\real players.
Cpu version=a monophonic version clavia released few months ago for free in order to addvertise their product and couse G.A.S.
you can get it from their official website.
i wana get the little NM1 keyboard sooner or later.