Of all the original LGB locos I have owned over the years, my two favorites were the Alpine Classic Set RhB Kroc with digital sounds, and the DR 0-6-6-0 mallet with digital sounds. The Krok's startup sounds replete with switches and relays latching, plus the vacuum brakes initiating are crisp and clear! The steam exhaust sounds on the mallet and the scraping of the fireman's shovel are well executed. The shrill European whistle was also very clear and melodious. This engine had the best Seuthe smoke unit I can recall of any of my other LGB dampfloks! The puffing effect was truly awesome!
The side rods on both of these articulated locos in motion also added to their appeal. I miss them both, but enjoyed them immensely while I had them!