Garmin 410 with hrm 100ish at Amazon
Slightly annoying bezel control which is not completely responsive
But in use it’s fine as you don’t really need to fiddle
610 is best and can pass for normal watch and has controls which are genuinely usable out and about
but @ £250ish 610 is quite steep – the virtual racer is a nice upgrade on the virtual partner of the 4series – accounts for varying speed over course and not just avg pace.
All the watch styles can do up to 8hr sessions if you need big days out or weekends away from power go for the 910 – which is also more bike mode friendly
Google dcrainmaker for more info.. Don’t over look the 110 either for basic pace and distance logging!