Thanks for all your responses. So, just get A70 and forget the other. Now, I'm planning to connect my JV1010 sound module to A70. If I want to add expansion card to the A70 which one should I get? VE-GSpro? VE-RD1, or JV1? Since I already have JV1010 I don't want to have a duplicated sounds. Is the JV1 sounds the same as in my 1010 except the session board?