Grinder angle recommendation!!! - Thanks in advance..
Looking for made in OLD WORLD (best quality) with flexibility, low weight and vibration control and safety, occasionally may be pushed a bit hard otherwise DIY

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1. Is it better to have more power output above 600W or lower weight?
2. Is the speed very important, i.e. above 8-9k rpm?
3. Is paddle (dead man) switch required?
4. Does anyone knows the difference in FEIN Blocking monitoring vs kickback stop?
Please advise on one or two of the following grinders or recommend an alternative one based on these or better characteristics.
#########METABO #############
WEV 10-125 QUICK - 2800-10500(8800 at load)rpm/ 6ms (vibration), 2.1Kg, 590W, 90 deg. head rotation, kick-back stop, vib handle, Restart, Soft start, Tacho control.
WEA 10-125 QUICK (600389000) - 10500rpm (8800 at load)/ 4.5ms (vibration), 2.1Kg, 590W, 90 deg. head rotation, kick-back stop, Restart, Soft start, Balancer.
WQ 1400 QUICK (600346000)-10500rpm/ 6.5ms(vibration), 1.9 Kg, 800W, 90 deg. head rotation, kick-back stop, Restart, Soft start, Tacho control.
WEVA 15-125 QUICK (600496000) - 2800-11000rpm/ 4ms (vibration), 2.5Kg, 940W, 90 deg. head rotation, kick-back stop, vib handle, Restart, Soft start, Tacho control.
###########FEIN #################
WSG 12-125 PQ QUICK-1100rpm, 5ms(vibration), 2.1Kg, 650W, kick-back stop, vib handle, Restart, Soft start, Tacho control.
WSG 17-70 Inox QUICK - 2700- 8500rpm, 5ms(vibration), 2.4Kg, 1000w , 90 deg. (kick-back monitoring, vib handle, Restart, Soft start, Tacho control.
#####FLEX#######
L 3406 VRG - 2100-7500rpm, 2.2Kg, 880W, vib handle, Restart, Soft start, Tacho control.
L 1506 VR - 2200-6800rpm, 1.9Kg, 7000W, vib handle, Restart, Soft start, Tacho control.
L 3309 FRG - 11000rpm, 1.9Kg, 610W, Restart, Soft start, Tacho control.