Low efficency cpu with a little bit of power, i tried the intel nuc with a celeron. i also got a raspberry pi, but too less power for my future projects. so here is my list with my current setup:

Image	Hardware	Price	Count
	Intel NUC NUC7PJYHN Celeron J5005	218,00 €	1
	16GB (2x 8192MB) G.Skill Ripjaws DDR4-2400 SO-DIMM CL16-16-16-39 Dual Kit	57,56 €	1
	Fantec DB-ALU3 3.5“ (8,89cm) USB 3.0 schwarz	19,86 €	2
	4000GB WD Red WD40EFAX 5.400U/min 256MB 3.5” (8.9cm) SATA 6Gb/	87,73 €	2
	CC2531 CC2540 Zigbee USB Programming Cable	$ 2.67	1
	CC Debugger Zigbee	$ 10.23	1
	CC2531 zigbee usb sniffer / tranceiver	$ 9.31	1