Had the new Niagara not come in a Pilot version I would not have pre-ordered one, but I did. I did not intend to until I got the e-mail from C. Ro a month ago showing their early-pre-order offer. There it was: Pilot. I'm toast. Been asking for it. Oh, well. I have all the painted Niagaras that I need: Lionel CC II (I have the gears, etc.; not broken yet); ERR-upgraded and weathered Williams brass (sweet); MTH with bad PS-2 - ERR upgrade going in as my next project.
So - if you were to offer the PRR S-1 6-4-4-6 anew, with a Pilot version as an option, I'd be there. I have a painted S-1 (3rd Rail), so I wouldn't be needing a decorated one. Pennsy or not, the 6-4-4-6 has to be one of the most striking locomotives ever built, perhaps the most striking. To have it in zinc and brass...well.
Not everyone understands (which baffles me) the Lionel Pilot and MTH Engineering locos, but they do open checkbooks when the plain painted ones do not. It did with the Niagara.