Garmin Touring vs 810

Ok, so I’m looking at getting a GPS for the bike with the main reasons being for directions and HRM – I’m not familiar enough with the local area to go on big rides without getting lost and would like the extra info a HRM provides (while getting lost isn’t a huge issue Mrs Madhouse gets a bit peeved when I’m back later than planned).

So, I’ve been looking at Garmins and would like to pick your collective brains on the Touring vs 810 debate, as far as I can see both will allow me to follow my preset route and display speed/gradient/temp/HRM data so I’d be fine with the much cheaper Touring Plus but there must be some big features I’m not picking up on for Garmin to justify the premium of the 810. Garmins own product comparison suggests the 810 only offers additional cadence data, workout programmes (not interested) and smartphone connectivity (nice but not worth the extra on its own).

So what am I missing? anyone got experience of either or both?

I know a couple of people with 810s and they think they’re great but admit to not using all the features so it’d be good to hear what people think of the Touring too.

Thanks.