I've always been a buyer of MTH Railking engines - good product, good price. Actually, I've only once purchased a "premium" level locomotive that I quickly sold - I realized I could have the exact same engine with a few less details that didn't really matter to me for nearly $200 cheaper. The only other "premium" level engine I plan to get, which I have on preorder is an MTH Premier Long Island 44 ton switcher.
I've not been buying much in terms of engines lately - but have purchased these two. My apologizes for the lackluster photos, it now appears my camera lens is in dire need of cleaning.
Railking Imperial 2-8-2 Long Island L1
MTH Imperial ES44
I really had no intention of buying these but I've found the detail level on new Railking to rival Premier - and this goes for Imperial and non-Imperial products. I've had the SD70 Imperial - the ES44 is hands down much more detailed and visually attractive. It runs beautifully.
The Mikado, despite a few initial hiccups, has been a solid little engine. The tender is my favorite - marker lights, headlight, doghouse, class/builders plate, etc. Lots going on not to mention the real coal, chains on the trucks, and more.
I've seen a steady improvement in the detail level of Railking products over recent years - and I've got plenty of 10 year old Railking engines to compare. Lots of improved detail, paint, etc. PS3 is not my favorite operating system ever although I do find it performs much better than PS2 in conventional operation. I've had minor quirks with capacitors and the electronics. Not deal breakers but I just feel PS2 is a bit more reliable and "predictable".
Just my thoughts on recent Railking engines. Consider this - something that I've looked at and what made me dump the previously mentioned premium engine I purchased than sold - Railking Vs Premier, the electronics are the same. They run the same. They (more or less) sound the same. Other than very minor detail variations, they are exactly the same. Many of the RK engines are also old Premier engines.