How much do you want to spend?
Ignore the videos of people picking mortice locks - these are either lock sport enthusiasts who have invested shed loads of time in refining their skills to do this (no thief is going to have the dedication or intellect to do the same) or people who have deliberately staged the video to either impress their internet freinds, or try to sell their products. Realistically, no criminal is going to be picking a curtained mortice lock.
The Chubb 3G110 is a very cool lock, but not BS:3621 approved, and extremely expensive. You would be better off buying a 3G114E, which is half the price, BS: 3621 rated, and was highly placed in the Which consumer test of mortice locks a few years back, IIRC it came in second to the Union 2134E, which is also a good choice, and is also sold under the Chubb brand as the 3U114E (again, IIRC). The Era Fortress locks are widely acknowledged as being difficult to pick by anyone who actually knows their stuff, and I would happily have one on my door. I repeat my point about the videos being either staged, or the result of years of dedicated practice, hours of specific practice to each different make and model of lock, and often, hundreds of pounds of specialised tools.
Whilst bump keys are a genuine issue, and there are videos of everything under the sun being bumped, this is a moot point if you have a wooden door with a lever mortice lock fitted to it. You'll also find a lot of videos posted by people selling bump keys... do your own working to find the connection! Kaba locks are excellent, but the choice of cylinder is not the defining characteristic of the lock - it's what the cylinder opperates when it is turned. I have seen kaba cylinders fitted to 30 year old night latches which can be opened in 5 seconds with some flexible plastic.
You are vanishingly unlikely to be targetted by somebody who will try to pick their way into your workshop, but quite likely to be the target of forced entry. You are on the right track with your (awesome!) door, extend this to the frame, and it's connection to the walls, and you'll be fine with whatever BS:3621 deadlocks you pick. I'd favour the Era Fortress as best value for money, but the Chubb just strikes me as better quality, and easier to fit.
For the record, I have been working as a locksmith for the last three and a half years, and have had to open and install most of the locks discussed, so I'm not just speaking out of my proverbial
**Edit**
Eurospec is a lock manufacturer, they make their products in the far east, and are widely used on new builds and developments because they are inexpensive and experienced in suppliying large contractors, architects etc. They're for the most part a bit cheap and cheerful, though not rubbish.