Very interesting discusion this. may i add my two pennyworth? Well i will anyway.
A good friend of mine in Swindon is into the RHB and swiss metre gauge lines in general. he was not happy with the look of any of the ACCEPTED NG Track systems as these lines are very main line looking./ So he went down the 10mm Standard Gauge 45mm track route. i was sceptical but think the it looks very good.
I use Peco to replicate my harz metre gauge track and am happy with that, one I had sorted out the skate shorting issue by converting all the points to Live Frog. I do use LGB R2 in the garden too, joined with Hillman Clamps. once the rail has weathered a bit I find that the difference does not grate so much.
I have had problems in the past with joining different kinds of rail How i coped with it was to Silver Solder short 3-4 inch lengths to make joining sections. Ok you may need to do some packing to make the sleepers fit, but this is a better solution. Lead Soldering will not pass the test of time.
Finally, if you are making track DO NOT USE BRASS PINS with wood sleepers in the garden, I speak from bitter experiends of my 150ft garden railway that all had home built track. Those Pins needed to be knocked back in before evry runnin session. Use steel that will rust in place, then preserve with engine oil.
Hope this all helps.
JonD