Integrated power for KEF R3 Meta

The Technics will be more than sufficient. At 4R, it is rated at 140 WPC (70 WPC is at 8R). It is a GaN FET design, as you probably already know, so efficient. This is from Technics' premium line (all they do anymore).

Amplifier power ratings

Watts per channel (“wpc”) in isolation are meaningless : it’s the amp’s ability to delivery high current (amps) that matters.

Don’t look only at the headline power figure - see what happens when the impedance drops to four ohms. If the number nearly doubles, then your amplifier has good current delivery and will be capable of driving more demanding speakers.

@caslon 

70W will not drive them properly. I have a pair of Ref 1 Metas powered by a pair of McIntosh MC 611s. I made an $8500 mistake trying to power the KEFs with a Luxman 590AXII. The bass output was nonexistent. With the higher power amps, I could convince you I am running a sub. You will need at least 200W with high current delivery. With any power under that, you will not realize the bass output they can deliver. 

KEF specifies 15-180W. You will be fine with the Technics, which is an excellent integrated amp.

Hegel H190 is a excellent  option and has a respectable dac and Roon ready streamer ,,checkout Anthony at Perrotta consultants good service and good deals with free shipping.,an easy recommendation .