new Parasound A21+ vs my old Rotel RB-1080

You've mentioned a lot of qualities that I like in a speaker. I thought the Sequel II were great and I'm sure the technology is even better now.

I was going to ask about tube rolling, but I see that your preamp takes 10 tubes. That could get really expensive.  

I'm guessing that you've experimented with cables? 

You have great taste in music. Can you bypass the tube pre-amp to see if that might be the culprit?

just don't give enough of that... more than an educated guess.

Ok, I was trying to be nice but now I’ll just give it to you straight.  Your speakers won’t give you what you’re looking for because they can’t.  I worked for Magnolia for a bit and listened to a lotta ML speakers with my reference recordings, and they just don’t do what you want from them.  You can put any amp or any other piece of equipment in there and you’ll still be disappointed.  And that’s not a guess at all. 

Listening to Audio equipment is a funny thing. A person preference comes into

play, correct system matching, your own ability to hear well, etc. I have noticed that many audiophiles who have bought and sold many pieces of gear have found good results. Some have multiple systems that have been mixed and matched. To get good results, many factors have to align.

I’ve had a great experience with my Rotel power amp putting out 200 WPC into 8 ohms and 350 into 4.  Plenty of control for my Arendal 1723 towers that crave good clean power.  Upgraded from a top of the line Denon putting out 140 WPC at 8 ohms in 2 channel Mode.  I looked at a Parasound but passed.  Your experience may differ.  Suggest making sure you can return if necessary.  I don’t think the manufacturer has that option available.