Apogee Centaur or Apogee centaurus slant 6?

Rafel0054, The Slant models are optimized to deliver more bass by being ported and I believe a larger enclosure. The original Centaur line is not ported but Apogee offered a port kit and ribbon suspension kit shortly before they closed down. The ribbon suspension kit was to prevent them from flapping when overdriven. If you push them too far over the limit you risk damaging the ribbons. The slant 6 will yield better bass but better is a word I don't use in audio really. I say different. So the bass signature may be lower (different or not, depending on your room). I've owned the Centaur Minor, Centaur and Now own the Centaur Majors. Of course the Major with the 40" ribbon and 10" woofer will shake the floor in your room easily especially with the gear you have. The other models may not. But will be satisfying nonetheless in all other areas. You may have to mate them with a very good subwoofer. I'm using two 12" Dali acoustic suspension subs with my Majors. When I use them they do a wonderful job. Personally I don't think you could go wrong but the Slant series is newer than the Centaur models. The Slant series and Centaur Series with the exception of the Majors are much easier to drive and you have the gear to do that speaker justice. Listen to a pair and see what you like. Remember they are about 83 to 85db efficient. And they love tubes too. I see you are solid state. They are wonderful speakers and are hard to beat even in todays market. I don't think you could go wrong with either but I'd go with the slant because it's newer only. If I got a good deal on the Centaur I'd have no problem with it either. And I have a liking for the Centaur and it was my favorite speaker for a long time.