It is another story, but once you're familiar with the flexibility that the Axe-FX II Original (even) gives you with the incredibly accurate modeling, you'll sell your gear.
I understand that an ElevenRack is more entry level and Avid did a great job at making that product. However, they aren't nearly as accurate of models and referencing of real amps in addition to having to pay for upgrades if there
are upgrades to be made. If you invest in the Axe-FX and an MFC, you have the full gamut of tonal/sonic possibilities even if it's an "older" model.
I won't lie, I will be buying the AX8 when it comes out but that's only because of the compact size it offers. It may or may not have the full range of possibilities as the Axe-FX II [any], but I'm willing to compromise for some of the key components it will be offering. Honestly, it comes down to what you're needs and wants are. The Axe-FX works superb for me for AMP and CAB modeling with ambient presets for my church gigs as well as classic rock tunes. Hope this helps mate, I would go for it and load FW 18.12 then use your Atomic.
You can thank me in about 3 months (let it sink in
).