Probably the Keela Ventile Heritage Smock.
I've had a Paramo Velez smock for years, bought from the Paramo 2nds shop on Ebay, but after multiple rounds of washing and reproofing, it seemed to be giving up the ghost when it comes to waterproofing.
I also had my issues with it: it could be an absolute sweatbox when you were working hard in anything more than freezing temperatures. The nature of the Analogy fabric also meant that anything you kept in the big kangaroo pocket on the front ended up getting soaked, either due to the outer fabric wetting through or the 'pump' liner moving your sweat through into the pocket.
After seeing some very positive reviews (
this one probably being the one that pushed me over the edge to buy it), I decided to get the Keela smock.
It has been an excellent jacket: it is insanely weatherproof. I dont think it has managed to wet through once in the 9-ish months I've had it, including a full dreich November day on Dartmoor. The pockets are huge, with a big kangaroo pocket and a single large handwarmer pocket that's lined with fleece (that is actually positioned so you can use it comfortably, unlike the 'handwarmer' pocket on the Paramo). These also actually stay dry! I've also found it a lot more breathable than the Paramo.
It isn't perfect: as per other reviews, the hood has naff-all adjustability and feels cavernous compared to the sizing of the rest of the jacket (despite me having a huge noggin).
The other elephant in the room is the expense: £309.95 RRP from the Keela website, although you can find these slightly cheaper elsewhere. On the plus side, due to it having a ventile outer, it wont need reproofing. Unfortunately it looks like Keela are discontinuing their ventile line