Opinion, so this is obviously arguable. This is an update on the two PS2.0 SD70 Imperial sets Santa brought my sons last Christmas. Each came with three double stack cars, the last car in each set having that end-of-train pulsing red light. Each set also came with DCS Loader (I think that's the name of the DCS "lite" remote gadget) remote control for PS2, track and transformer. Six months later, and still very impressed overall. The locomotives are very nicely detailed and virtually scale (17"). Great pulling power, great sound, full suite of all DCS features (my sons have mastered using the doppler effect and it is so cool), cab figures, etc. Today, I was looking closely at the double stack cars. Even the cars themselves are impressive. An incredible amount of detail on the cars and the double stacks are also very realistic. In fact, the cars are likely the most detailed such cars we own, including some from Lionel from a few years back. All for around $300 per set. I really think these sets are a great deal.
Peter