On the Areca you obviously do not have the fan installed, which causes your temperature to be pretty high. Around 50 - 53 C would be normal with the small fan @ 2500 RPM.
All other temps are perfectly normal on a system that is effectively cooled.
I will get the 4 screws today to add that fan to the Areca.
The screws that came with the fan are too thick to screw into the heatsink spacing.