Amp choices

Nice speakers, they probably do deserve a better amp. The Aragon is a solid performer, and I would think it better than the A21, but I think both amps are mid-fi.

For a real improvement, you would be better off trying a high end amp from the likes of Pass Labs, Plinius, Coda, Wells Audio, or Clayton Audio.
High end speakers deserve a high end amp.

Yes they are nice speakers.  Thank you.  I was thinking about a more significant upgrade which would include a Pass 250.8 or a D'Agostino Classic stereo amp.  I think the A 21 might be a sideways move.

I have a Pass and know the Halo A series amps and there's no comparison. Not even close. I have a X250 not a .8. The older X250 is still a great amp and can be had for a lot less than the .8. I'm sure the .8 is better and that will be my next amp, but if you want to start for less the X250 will not disappoint; it'll be a big step over your 8008.

The Pass and Krell's are different from each. Some prefer one over the other so see if you can listen to them first. I listened to a couple of Krell's at home and at the local dealership and they don't do much for me. I preferred my previous ARC 100.2 over them as it was more musical to my ears.

If you pick up something used you can probably flip it and not lose much if you don't like it. Reno HiFi will let you demo which is nice; just have to cover the shipping if you decide not to keep. Not sure you'll find a Krell dealer to do that but maybe.

Thank you.  I hear good things about the .8 amps and the 250.8 seems to be the sweet spot.  You mentioned you know the A21 well.  Would you say it's sideways to the 8008? 

That Aragon is still a nice amp, some would say better than the Parasound.....those speakers are definitely worthy of something like a Pass.