That's cool Justen. I love the Invader 100 also. I still hope to be able to try it with my rig sometime. And no I've never tried the Steve Morse, how do you think it differs from the other models? I may be getting a Blackmore in soon, hows that one?
Either they didn't have the Blackmore in the store I was demo'ing amps at or I just didn't see it, so I can't really comment for sure on that one. There are some forum members here who own them though.
As for the Morse, it has been many months since I was in the store, but from what I remember it was a very open sounding heavily midrange focused amp. 3 channels, channel 1 was chimey clean (as good or better then the invader), channel two was very similar to channel 2 on the invader, british rock to heavy metal territory, and channel 3 was the unique one. Channel 3 was a very open and uncompressed high gain sound with all these midi switchable mid range knobs. The engl website lists it as a "MID CONTROL MATRIX with 8 different Midrange voicings" but I don't remember all the ins and outs of the system. I'd say it was definitely an amp voiced for a lead guitar player, while still holding it's own for rhythm riffing.
When I left the store I was favoring the Invader due to the extra channel and relative ease of setting up each channel, while my friend who came along for the trip was heavily favoring the Morse (and he spent more time playing and tweaking the Morse). In the end it really could have gone either way.