I've kind of narrowed it down to two options now really... simply put.
Both max 40k miles, manual, 1.8 Petrol (would also consider 1.6D maybe), not black. 5 door.
8th Gen SE/ES/EX 2010-2012 facelift model and change the headunit to an Android Auto supporting one (must not get one with a built in sat-nav version though or Connects2 wont work).... roughly £7000. Would have cruise control (only Si model doesn't have cruise control and folding mirrors, I think). Tax is £195/yr on 1.8 petrol
9th Gen SE/SR 2015 facelift model with Garmin Nav and not need to change the headunit. Would have cruise control (only S model doesn't have cruise control I think), folding mirrors, reverse cam, bluetooth audio, parking sensors. Roughly £9000. Tax is £155/year on 1.8 petrol.
I've pretty much given up on Mirrorlink. Sat with Blackpool Honda last night for over an hour in a 2016 model without sat-nav with the sales manager trying to get Mirrorlink working, and got absolutely nowhere.
Other option is to use a magnetic phone holder and run google maps on the go that way... and I guess bluetooth audio would pass the audio through the speakers anyway - which may end up being the best / most upto date solution, rather than trying to get the perfect solution out of older tech in these cars.
I like the look of the Sport, I just wish they had bothered fitting folding mirrors to it, can't believe they didn't - every other model has it!