I actually faced this issue recently as I love the euro steam engines that MTH produces but I only run Lionel exclusively in legacy and only the most feature packed engines with the big curves. Good luck with your decision making. I recommend taking the plunge. DCS may turn out not to be as impressive as legacy (opinions are opinions) but at least you have the engine you desire the most. I found DCS acceptable to run the one MTH engine I have and execute all of the features without resorting to conventional. Conventional would have been completely unacceptable. I'm also looking to add the premier Erie Triplex as Lionel refuses to make this engine and that fact rubs me raw that I would never be able to own it without MTH.