After considerable evaluation and number-crunching, I am simply cannot afford nor justify selling other stuff off to pay for No. 90. Lionel has pushed the price-point over the top on this model, albeit for my little world. It's all relative, and the fact that I have the PE Acela set on pre-order was a factor in my decision; too some that set was over-priced however I got a very good pre-order price on the set and add-on cars.
I already have the MTH Strasburg cars and use my Legacy Reading Atlantic to pull them - not a perfect match but it's a nice consist.
For those that have one on order, I'll likely drool over the forthcoming pictures and videos, and part of me will regret not pre-ordering one. Lionel indicated that future No. 90 models are forthcoming, so maybe one day.