I'm going to break this down into some categories.

Your thoughts on each category.

Tube amplifiers - Does it really sound better for mid to high freq?
I have no opinion.

Consumer grade amplifiers - Technics, Sony, Aiwa, JVC, etc.
Is it junk ?, I think so. Weak power supplies and output stages.

One step up from consumer grade amplifiers - Denon, Onkyo, Marantz,
Elite Pioneer, Yamaha, etc. I think this stuff should be the normal
consumer grade stuff, it's worth the money paid I think.

High-Fi/low end exotic - Parasound, ATI, Adcom, Anthem, B&K, Rotel,
etc. I think some of this stuff starts to resemble good circuit
design with beefy circuits (transformer/output stages), probably
worth the money paid.

Exotic - The field is wide open, Krell, Passlabs, Levingston,
Conrad Johnson, Bryston, Jeff Roland. blah blah blah ........ blah blah. I find it hard to justify paying $10k for 200w/ch amplifier - heheh I'm sure they are fine amplifiers, construction, circuit design, but god-aweful expensive.

Prosound - Interesting, seems to give a nice bang for the buck.
Crown, QSC, not sure about this but Cinepro, who else?
Sonically, what is wrong with using these in a home stereo ?

Esoteric - Bob Carver's Sunfire - The controversial designer
has done it again with his new innovative tracking downconverter
(patented) power supply. I read his patent and I'm amazed at the concepts.
My real issue is whether this design can power subwoofers as well
as a similar amplifier in it's class. In theory, it should outperform
many amplifiers in it's class for mid to high frequencies due to
it's high dynamic power capability (handing transients).

Which brings us to tubes. For the $$$, there is nothing else. $500 to $1000 buys 95% of what you get in the mega amplifiers except the power. Building Bottlehead or Consonance or buying Jolida or ASL; if you have hi-efficiency speakers, that's it.
And nothing under $5000 in solid state will give you the mids and highs you mentioned. In fact, the SET crowd, of which I'm a member will say only tubes at any price.
And you can certainly pay the price of a nice house for tube amplification these days!
Don't know about the Carver products but the fight with Stereophile was fun.

and then go here for an idea

I have been using/auditioning the LeAmps for about 3 weeks now. Seem pretty good. Really good, actually. I also use QSC for the low end. I am thinking of ordering their tube amp soon to add to the system, powering some Wayne-inspired quasi-4 Pi Pro series............I expect Michael Barnes stuff to sound good. Frankly, I like his approach to things. It's not totally unlike Waynes, in a way.............
MBB

• SS link

tube power amps - depends upon speaker - with sealed back chamber basshorns having low z variation, low damping factors can be "ok" - SE can sound excellent as can push-pull triode sans feedback (pp may alow better bass control w. reflex - more usable primary L) - output Z interaction is part of the result but suspect low-gain structure allowing deletion of feedback will sound "pleasing" in many instances - more 'holographic' neat 3D effect on guitars, etc - in other instances with large reflex peaks - might muddy up especially SE w. interstage where LF distortion lurks - old mod Eico ST70 running ppp 6BX7 triode w/o feedback and 6DJ8 up front were acceptable in bass with surplus Klipsch 8" in pseudo-D'Appolito Madisound offered some years back - Eico iron good to >70Kha into resistive load

consumer grade stuff vs midline vs high end solid-state . have heard extremely loud sounds from cheap 5 channel receivers running 2-channel maybe not most refined of solid-state but strong enuff to push 95dB sensitivity - @175 vs $7000?? which 'sistor to choose?

Freddy

Bill

In my opinion the noise of the forced cooling is a big disadvantage. This can be rather annoying when you listen a low levels.

Best regards,

Walt

Kevin

Kevin

and also here
http://www.norh.com/products/leamp/bg.html