In the same situation, few years ago after injury, my choice was spin-bike.
Using LeMond Revmaster Pro
http://www.lemondfitness.com/sites/lemond/upload/products/3-large-lg.jpg?1260493387
1Mil % reliable, needs nearly zero maintenance ( just few drops of oil to leather brake pad a week)
Minimum electronics, also could be used in 100% mechanical mode -all you need is heart beats monitor (smartwatch eliminate this issue :smile: ).
Before I got electronics block I used Mavic velo comp for cadence control.
Yes, I may by not cheap stuff, but u get absolutely immortal device that may by used for ages.