I'm not aware of any 'new' Bachmann steamers. Their Spectrum line dating to the very early 2000's, maybe a couple of years before that, were much better quality all around than what preceded them, and what is still found in some sets. I think Bachmann let the brand die on the vine, but since they had a good thing, they just subsumed the Spectrum lines into their regular offerings, and that is what they sell now, just only as Bachmann steamers. Their EM-1 "Yellowstone" is about seven years old now, a very good runner. Maybe a streamlined Pacific and a Mike are new, but my bet is that it's only the shells since the former Spectrum frames and drives were holding up well and received few complaints.
You will get good service, and available parts, if you elect to purchase current offerings. Bachmann stands behind their product, and for the most part they offer a quality product. Their sound and DCC is often stripped down if it's an econo line, but if they claim a brand like Soundtraxx or ESU LokSound is on board, you should have a good solid DCC experience.