kbrkr is right.  Sounds like you're needing a good contoller keyboard.  Studiologic does make some nice ones.. Actually I don't know if it's still being sold, but there was an 88 key (semi-weighted) contoller by Studiologic for like $299.  That's a great deal.
Squeak
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GEAR:  Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller).  SOFTWARE:  Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.