by themselves, the additional Rhodes/wurli voices on the PF card are plenty good -- there's a delayed dyno rhodes and several examples from diff eras ('70s, '80s, a real David Fosterish one called Tonight); when I rolled thru the Motif Es the other day, I noticed that many of the onboard eps are taken straight from the PF board...
what I really like is combining them with the onboard 9kpro eps. one fave combi is R1 doing the pro's "Stage Piano" with no effects, and R2 one of the wetter less "grabby" sounds from the PF. these combinations are especially good for wurli sounds: the pro's wurli I find thin, but with help from the card it is a very meaty yet totally characteristic sound. I use the acoustic patches on the board much less, and since piano sounds are such a lightning rod I'm leaving 'em alone...hope that helps...