I dont think its fair to say ditch A3 altogether. The Orange and Engl are are very good.
Don't get me wrong. I like it. It's just that I want to keep things simple when putting together a live rig. For recording, totally different story.
To be honest, I haven't tried the Engl stuff yet. And I've never been an Orange guy, either.
In an ideal world, there would be an all-in-one solution, but what can you do...
I'm getting pretty close with Bidule as VST host, Amplitube for pedals and S-Gear for amps, reverb/delay and cabs. Simple enough. Great tone.