Does the 140 sounds as luse and warm as the older models?
In a word, no. While the Premier 140 is not out of character with the CJ 'house sound', it is more toward the neutral when compared with the Premier 12s or 8. And, tt is the most resolving CJ tube amp I've heard. With regard to 'loose' - the 140's low end is not the last word in tube amp bass definition though it is very good - best yet from CJ. Read more at: Soundstage review.
Imo, at $7k usd, the 140 is an excellent amp for the money. You can spend more, but the law of diminishing returns sets in very quickly. It should work well with the Thiels which tend toward the 'assertive'.