I have a Friedman Marshall and an Atomica. The Friedman has the kitchen sink, effects loop, Saturation, and simple clean. It is the best sounding amp I have ever owned.
Both amps go from clean to scream, the Friedman has a narrower band of available tones than the Atomica but not by much. The Friedman has the best master volume circuit you will ever see. I get great tone at whisper levels and at cracking plaster level. The Atomica's master is more touchy.
Both amps will sound good playing Tom Petty to Slayer. The Friedman is simpler to dial in, I turn all the eq knobs straight up except for the bass ( it goes to 9 o' clock) and forget it (this could be because I have had the amp for 2 years). Because the Atomica has more tonal options (via switches) I tend to adjust it quite a bit. This is probably because I have only had it 5-6 weeks. Of course you get that Cameron grind too
If you were sending an amp to Dave, I'd wait to see how you like it before doing anything else. Dave's modded amps and the Atomica are both fantastic amps. If I could only have one amp, I'd pick my Friedman. This is because of sentimental reasons only. Fortunately I can have both
Listen to Zachman's clips, the Atomica is that good. After you get your amp back from Dave, save up for the Atomica, It is the first new amp I have bought in years and I do not regret it all.
Here are clips of my Friedman:
https://www.youtube.com/watch?v=liuEmMP9Tls
https://www.youtube.com/watch?v=4ZWkYYWfhrw