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I've used an Altura Nightvision jacket I got in a sale for 18months (two winters). It performed flawlessly.
Winter boots useful, waterproofing and insulating feet is essential and it'll save faffing with overshoes (although that's exactly what I did due to budget - PX Agu for £8).
Some deep winter gloves (crab claw) as well as medium-weight waterproof gloves for when it's a bit milder.
One area I wouldn't scrimp as much is winter bib tights. Using them daily means fit and comfort is important as is actually being warm and water-resistant-ish. I'm not talking rapha or assos necessarily, just not bargain bin stuff.
Merino buff - essential for ears and covering face when it gets subzero.
Be aware that for bib tights and base layers you'll need to double-up as it's not always feasible to wash and dry them every single day. And putting on wet stuff before you even leave the house is always demoralising.
Is it worth splashing cash on a rapha jacket? Or are there cheaper, less nice looking ok alternatives?