Pass/musical fidelity for focal scala

Yes, i'm a newbie to this hobby.. Just trying to enter this audio hobby slowly, that's why i make the priority on the focal scala first, amp second n everything else slowly... Bout oppo, it's connected to the other home cinema system, but for now (oppo as a player+preamp/volume control), it's enough for me.. Trying to set "other equipment first... So back to my question, which one (mf ams50 or pass xa60.5) you think will be better combination for the scala, so i'm making a right decision "one by one".. Sorry for my language, english is not my first language... Thx..

Thx.. I'll keep in mind ur thought.. Meanwhile, is there any problem bout reliability about the class A? How hot can it get for long use?

Thx zd542 for ur exp sharing.. Nope, nowhere near my place... How about the heat?? Mf/pass.. Is it really hot so i cannot touch with the bare hand?

Thx jdoris.. Btw, is there any chance that a new beginner like me can hear the difference between class A or a/b one.. Regarding the heat, is it safe to use the Class A all day long? My city here don't have any audio specialty brand.. So i must prepare the time and narrow the list..

Really nice of you two to share it.. I know every equipment must be equally to get a "better sound.. Right now my budget for something around 5-10k.. So my priority is getting the amp first, later to get everything else done.. Slowly here means i get the amp and speaker first which in my opinion the " best for me now" and getting the other equipment slowly while i don't need to change the speaker and amp again in the process.. I know this hobby is kind of "every connected equipment making a different sounding result..
Anyone ever try mf ams50 or pass xa60.5 combine with focal scala?