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.