In reply to Os_878:
I've got the original R1, non-hoody, half zip, it must be 15 years old and still looks smart despite lots and lots of use. In fact I was wearing it just yesterday climbing in the Lakes. But maybe 10 years ago I got the MEC copy of the R1 hoody, really great and still used a lot. I think the MEC version is a very slightly lighter fleece than on my R1, but I don't know if the later seasons from Patagonia of the R1 hoodies used the same weight of fleece as my original R1.
But anyway - about 5 years ago I bought an Alpkit Griffon - they seem to be back at a penny under 50 quid currently, but Alpkit often seem to sell them on sale at 40. It has a full length zip - I wasn't convinced about this at first, but it has turned out to be a positive only - I can't find any downsides to it. For 35 or 40 quid that I paid for mine, it's one of the best bits of kit I own. It has thumb loops too. Well worth a look.
It might be unfair, but my impression of ThruDark is that it is clothing made for people who REALLY REALLY REALLY wish they had been in the SAS, but are actually BMW driving accountants from Slough. This is not to say there is anything wrong with being an accountant, or from Slough, or even being a BMW driver (although I remain to be convinced on that one), just BMW driving accountants from Slough who would like others to think they are "ex-sas".