A fe little bits of information that will help fill in the edges Russ - i've had my 827 Sterling a long time (16 years next February 29th) and had planned on keeping it for considerably longer. However a rotten sill which was meant to be welded by the MoT tester that failed it was only half done and then it was uglier than an ugly thing that lost a fight with the ugly stick.
When i submitted it for MoT later that year (it took 6 months to get the car back!), the tester basically threw it off the ramp and showed my why. Many parts weren't even welded, leaving the car unsafe at best and a death trap at worst, no wonder it felt wrong while driving!
A few months (April last year) i spotted my S Type and bought it. It filled the formula the 827 had, big Japanese derived V6, Stone Beige/Light Stone leather interior (Rover/Jaguar names for the same leather!), very comfortable with all the toys and importantly for me, the S Type has an LPG conversion. It's also only the second car to put a smile on my face whenever i drive it, the Sterling was the first.
Also had my Volvo about 7 years, had three 740GLEs before that but had always wanted the V6 (like the Sterling, a 90deg V6 unusually) 760GLE but in all honesty, having owned this one for that long and done many jobs on it, discovered much of the Volvo engineering is the paper bag and scissors style then put something nice looking over the bodge to hide it. Yes, the mechanical side is good but the cosmetics are a bit rough in places and as for using soya bean derived wiring insulation, that's just silly!
Having also had some Hondas before and of course the Rover being codeveloped with Honda when the first Legend was made (Project XX (Rover)/HX (Honda), it made a Honda a natural choice for me as a replacement for the Volvo. The rest i think you know!
As for the Discos and MG-f you own, many parts are shared with the 800, depending on year etc so if you find yourself struggling for any parts, give me a shout, i may either have the right bits or know of someone who does or what will fit in place, even if it's not officially an MG/Land Rover part. Another one that is useful for us S Type owners, certainly the early ones anyway, the screenwash pump is also used on a variety of Fords (Transit, Connect, Mondeo, Sierra and others) and the first gen Volvo S80 so a replacement is available on ebay for under a tenner.