Welcome Tim,
Just on the journey myself - been experimenting since the C-7 came out in my shed and caravan while we build a new place. I've been leery of smart locks as they seem to be poor locks, but living out in the country off-grid, it's probably a good trade off to be able to let someone in someday from wherever we're at, so ... I'll watch for good pointers. 
I've not really thought about a security system per se, but am thinking I might go with a Unifi Protect setup and just run Hubitat Safety Monitor as a motion detector that snags a few frames and sends them to our mobiles.
The Sonos is fun to play with - in my shed, if I'm Away (or turn it on to freak people out) HSM senses motion or door opening and the Sonos plays the voice saying, "security breach detected" and the coloured lights come on in red. I need to get the Star Trek "red alert whoop whoop" sound byte I think.
I have a couple dozen Aeotec Wallswipes and nano dimmers / nano dual switch modules for the lights indoors - the outdoor ones are not dimmable other than the ones at the deck - which will use the same touch-slider wallswipe.
I need to pick some high density LEDs to put in channels under the cabinets and vanities (wifey has those 'floating' vanities), and as a future project, having electrics in place for dimmable LED channels in various places like walk in closet, or a 45 degree diffuser channel around the ceiling/wall corner. Not sure which ones are good, but I have an Aeotec smart strip (I think they're discontinued now?) in the shed - turns red when the alarm goes off, or when I set the scene to "Telescope Time".
Aeotec has been my favourite but I like the Fibaro smart implant and may try more Fibaro stuff. Got several Multisensor 6's and the drywall mount ('Recessor' I think they're called) - with those, the dimmers and dimmable track & downlights, I spent the money on the controls rather than the LEDs, which means I should be able to use the controls with newer fixtures, and hopefully more cost-effective ones.
I sound like an Aeotec salesman but I have no commercial interest or friends involved with them lol - but there is a "nano shutter" too! 
The dimmer, switch/double swithch, and shutter controller all snap onto the back of a Wallswipe and configure themselves accordingly: dimmers are a tap on/off, slide up/down to set level, a short-range IR sensor for touchless/dirty hands, and if you hold it, it will also dim up or down. If you put a dual switch on the back (same little ribbon cable) then the touch panel changes to two zones that are tap on/off. If you put a shutter controller on there, it sets up with 3 zones, for up, down (left/right? open/close?) and stop in the middle. When I get blinds, my current thought is to use the shutter controller but I am not there yet - and not married to Aeotec though it certainly seems like it as I write all this Aeotec this and Aeotec that...
I've been searching for HVAC and HRV control options but other than the Intesis interface, I haven't found any drivers when searching for mitsubishi heavy industries - thanks to the others who have recently posted as I see from Simon there is someone who's made drivers somewhere, which is my next hunt.
Chris in central Vic
couldn't resist 
