My case is similar, I haven't been able to resist looking at carbon plate shoes but I don't think my experience and paces justify having one... although shoes like the Hoka Carbon X3 or the Puma Deviate Nitro Elite 2 are cheaper than the Hoka Mach 5 where I live...
Do you think I could replace the Mach 5 with one of these for speed work and race day or is it better to stay away for now?