OcUK don't sell smartwatches so you're OK to say Amazon.There are currently some deals on the rainforest for Garmin, I've been after one of these GPS/excise watches for a while.
I've been a long term fan of the Fenix range from Garmin, some great deals to be had on the Fenix 5 now it's been superceded.
That said, the Garmin app is crap, and buggy. Also been hacked pretty bad if that bothers you.
Do you have a budget in mind?
If I needed a new watch tomorrow I'd find it hard to not buy a Wahoo Rival.
Have you seen the Wahoo Rival?
Fair one on the Garmin app, YMMV I guess.
Have a Forerunner 245 as it seemed to be the best at the time. It did develop a screen fault but was quickly replaced by Garmin. Been pretty flawless, links to Strava, tracks sleep etc. Really great buy.
235 is pretty old now so avoid if you can.
Watch DCR's review of that yesterday. Looks good initially, but there are A LOT of basic features it cannot do. It's basically set up for triathlons.
But a lot of basic stuff such as step tracking, sleep tracking, VO2 max tracking, recovery tracking etc it does not have.
Just get a Casio with a stopwatch.