I have both the Marshall JMP1c and JVM1c. They are both great. The JVM1c is more versatile, since it is channel switching, has an effects loop, and a line out. It has lots of gain in the lead channel, and a really nice clean channel. It is a great, modern sounding Marshall, and perfect for home or studio use. I've even done small gigs with it, using the line out to the main PA system. The JMP1c is more of a vintage Marshall sound, and perfect when you want classic Plexi-type sounds. It is somewhat less versatile, with no loop, no line out, and no master volume. But it is totally awesome for what it does. If you like controlling your output and OD with your guitar volume knob, the JMP1c is perfect. I use them both, and will never sell either.