My favourite set as a kid was my 7740 I was given for my 7th Birthday - Still complete, still running, side by side with my Son's 9V.
When I saw the 4-Wide track I knew I had to build a mini train set. I have spent a long time trying to settle on the size and type of Engine, and finally decided to go with this:
Narrow Gauge rail 7 by The Solitary Dark, on Flickr
Narrow Gauge rail 14 by The Solitary Dark, on Flickr
Narrow Gauge rail 11 by The Solitary Dark, on Flickr
Narrow Gauge rail 1 by The Solitary Dark, on Flickr
I added the small countryside scenes - My son wants me to now add some Cargo.
Like lots of folk I hope one day there are some 4-wide straight tracks, or even points.