Another, which watch should I get thread? (FR 235, M430 or....)

So, looking to the experiences of the various members here!

I've had a FR 220 since 2014, and its starting to play up (freezing a lot etc). So reckon it's time to replace.

• Generally I like the functionality, although the chest strap stopped working ages ago
• I would like to have HR (preferably optical) back again.
• Budget about €200, but might get permission from the boss to stretch it if I can justify it.
• Mostly run, but i do record my cycling commutes (at moment i just manually change the activity type on Strava after it uploads)
• I do love data!
  

I've been looking and seem to have 3 options, Polar M430, M600 or the FR235. If there was a deal on one of the more expensive Garmins (735 or 645), I think they would be good too.

My initial thoughts are that I like Garmin, and the 235 is available kinda cheap these days because its old. But that's also a negative in a way, my new watch is actually a 3+ year old design.
The polars seem impressive value, but if I have optical HR, seems a shame that it doesn't consistently monitor it?

So any thoughts experiences etc? thanks!