I went amp-modeling a year ago for the convenience and flexibility which works well for playing along to jam tracks, learning licks, and recording. Currently I use a Zoom MS-50 and an analog OD into my studio monitors with surprisingly decent results. I heard a while back that the weak point of the MS50 is the Cab IR which put the epsi on the radar. Then the Amplifire came out. With the IR's being equal, how much 'better', if any, is the Amplifire's amp sims compared to the Zoom's?