I suspect some of the temperamental behavior of your bike was due in
part to your referring to it by the wrong gender, such mechanical
contraptions, like ships, are generally considered to be feminine are
they not?

Anyway, the bit about the cycle computer... I would recommend a GPS
instead.  These are not without their drawbacks; they suck down
batteries like there's no tomorrow, they won't work on a trainer, once
you get one you'll waste countless hours superimposing your
breadcrumbs over topo maps and so forth.  The initial purchase is more
than even a wireless cyclo-computer and the cost of regular batteries
(if you use disposables) will out pace the watch batteries that the
computer uses very quickly(okay it will probably still cost more even
if you use rechargeables).  But even the wired cyclo-computers only
seem to last about a year before I need a new wiring harness and the
GPSes that I use are all more than 5 years old w/ no failures.  Well,
other than the aforementioned inability to work in a tunnel.   And if
you get a fancy model you can download street maps of the places
you'll go to help when you are lost.  I mean a map is good, but a map
with a blinking dot that shows you where you are on it F.N. rules!