Since you have a serial port, either should be fine. I used the Studio 5s for years and still have them kicking around. I'm more familiar with setting them up than I am the Unitor, but I run OMS and have all my patch banks happening under PT with the Unitor, so it's working very well here. The only drawback to the 5's is that Opcode's no longer around for repairs (and I've had a couple of those, too).
------------------
KK Proffitt
www.jamsync.com