A great watch (Garmin Fenix 8) and as always a amazing service from FCW! The Garmin Fenix 8 worth the move from the Epix Gen 2 Sapphire (4 years of that!). Better screen, faster response in general and GPS, some additional capability too. At first I was questioning why I moved as the Epix 2 as it is still an amazing watch and is now around £350- £400 (half of a Fenix 8). Although, after a few days of use I thought it was well worth it. The screen improvement is worth it alone as you look at the screen so many times a day, the other big win is that it connects to GPS so much faster than the Epix 2. Additionally, functionality includes the phone and speaker which could be useful, and works well, and the more useful LED/ torch light too. If you are on a tighter budget, Epix 2 is a great buy (I paid double what they are now), and in daily use it hasn't suffered any battery degrade, sapphire glass is like new in over 4 years. If you can stretch to the Fenix 8, go for it. Pro not worth it if you carry a phone in my view, as the Pro's main selling point it the ability to make calls with some kind of equivalent eSim/ virtual sim (Garmin) , and this requires a level of payment (set-up and monthly fee). Perhaps worth it if you run Ultra's and don't carry a phone or need an extra safety backup.
I went for a 47mm, the 52mm has a slightly better battery life, but you can extend all of these Garmin's via setting adjustments. The 52mm also a little too industrial for day-to-day (noting that 5mm is the diameter difference which means a 22% bigger overall face!). I wasn't tempted by the solar version, this has better battery life when out, but the screen must less pleasant and less bright. The Fenix 8 AMOLED is great.