I kept my Marshall tube amp as it's a limited edition (truth is I probably won't get what I paid if I tried to sell it though). That said, I never play it anymore, my AFX XL is just right for me. I did play away from my church a couple of times (normally play at church with my AFX using IEMs) and the away venues did not have decent monitors or an IEM option, so I took the Marshall fed it from Output 2 of my AFX which that was awesome cos I had a real amp/speaker next to me (something you miss with IEMs). So I recommend keeping at least one amp for when you play at venues that don't fully cater for monitoring etc.
Or keep them both, so if you ever have a moment where you think your AFX is not cutting it, then you try the tube amp and realise quickly you are better off with the Fractal!