[Closed] Bike computer jobbys... Newbie looking for advice.

I'm looking for a computer that would be able to....
-Store a route and tell me when to turn ect
-Tell me my cadence & be compatible with a heart rate monitor
- Work well with Strava 😯
- Obviously display speed too.

I've moved to a totally new area and have started road biking now as well as XC riding. I'm not familiar with the local area so have been making routes on bikehike and loading them onto my iphone but it's a hassle fishing it out each time I can't remember where to turn. Trying to monitor if I'm improving on Strava isn't much good because I doubt it's that reliable.
Plus that fact that I'd like to take cycling more seriously and work on my fitness level, I think by having a HR monitor and cadence displayed it's taking planned training further?

Any advice would be great, I'm not looking to spend the earth but would like something reliable and accurate.

Thanks all!