2-rail and 3-rail are different hobbies. Beth is doing an amazing job even thinking about a 2-rail offering as first choice. For committed O-scalers (dedicated that is, not 'committed' as in institutions) look at what Heljan is achieving in the British market ... and luckily Lionel is not a household name over here.
The D&H never had SW1s, but I'd look for a local shortline to justify buying one, I promise Beth. The OO/HO modellers over here love the heft of O-scale (2-rail of course) and are setting up tiny layouts for O-satisfaction. It's not good enough to say "fix your problem Beth by doing 3-rail as well." Different wheels, frame/pilots, 3/2 trucks, innards - electronics and tower-power, all contributing to 3-rail extra cost. No, no Jason don't mention rotating bearing caps on 2-rail diesel axle ends ... oh, too late.
There are many 3-rail models that could be worth buying if they could be yanked off the production line before the 3-rail chassis was screwed on. I know, I know, it's been tried by Atlas.
Anyway, good luck Beth, the rumour that a new version of the mythological tale of Pandora's Box is being released as Beth's Box by Hollywood must be something somebody made up, eh?
Jason
ps: CP Action Red