I do not feel bk-5 sounds better then G70 the sound seems very thin to me it is worth 999.00 but not in the same sound league as G70 I have a casio px3 if you are intrested the Yam MO8 good unit and very light as a portable stage piano/synth 32lbs good sound and 88 keys
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Genos, PSR S970, Fender Tele Amercian Deluxe Cherry sunburst , Cubase Pro 8 ,Yamaha A3M Acoustric ,Taylor 814, Ibenez Artcore Custom Tascam DP 32 Yamaha DXR 10, QSC K-12, K 12 Sub K 8 Sinn 945
2 Fender Expo line units .