I really like the DHB merino base layers from wiggle. They kept me nice and warm last year, and will be re-emerging soon.
Admittedly I haven't tried rapha's so cant compare. I imagine in the long run the dhb are not quite as durable, as they have a thinner mesh section down the ribs. No problems with them so far though.
the Rapha ones are nice but about as durable as wet toilet paper.
the Rapha ones are nice but about as durable as wet toilet paper.