From Miniature to BIG

I know what you mean, 2 coaches especially with a loco like an A3 or A4 is just a joke, even 3 looks a bit odd, although on a small 00 layout you'd be hard pushed to have many more than 3 or you'd end up with the loco chasing it's own tail if you're not careful. With TT120 though you should be able to run longer train's without it looking too silly even on a smallish layout as you'll get more in the same space. With that in mind I'd be inclined to prefer 4 or more coaches with a pacific loco in a set as well.

Mind you even as they are the sets are pretty good value, a loco, 3 coaches, and an oval of track with points and a siding (not to mention the power supply etc...) is actually pretty good value and saving against buying the items separately. Especially as the rolling stock in the sets is still full detail, not the 'railroad' type models that Hornby introduced for 00 sets to save some money. Personally I really want to see TT120 succeed as the scale is lovely and the models are stunning quality, be interesting to see how it pans out in the next year or two.