Hope I have answered your qns
Not really
I think bright/warmth is a characteristic that I dont like
Ok

Most of the SS amps have < 0.5dB of deviation in FR from 20hz to 20khz. Speakers have easily 10 times more variation... And the room will easily add another 10 times deviation over the speaker's. So the warmth/brightness thing you mention is mostly the room and speakers. In the end, the amp has
very little to do with it. Just think of easily 10dB variations from room speakers, and <0.5dB from the amp...
Ex:
http://stereophile.com/integratedamps/907onk/index3.html vs
http://stereophile.com/floorloudspeakers/dynaudio_sapphire_loudspeaker/index4.html
You could do a lot more improvement by playing with placement, adding room treatment, changing speakers, etc...
t is the overall sound that I dont crave apparently - put in a free jazz record like Roy Campbell and it is too in my face - definitely not how a record like Akhenaten suite should sound.
Are you 100% sure that's the amps fault and not the speaker's? Got a pic of your setup?
Thanks for oop
NAD C372 - sound is honest and the mid range is great. The marantz is great - I dont deny that. All I am saying is that there are better amps to pair with the dyns.
I think you're putting too much faith in 'synergy'. Many swear by it, but hey, if you have a good amp able to adequately power your speakers, it will sound great with any good speakers. Either the amp can power the speakers, and does its job adequately, or it doesn't... I think the people gaining the most with 'synergy' are the dealers selling more amps.
The better amps thing is mostly audiophile bull. Most people who have compared amps in a controlled way have found very little difference. Actually, basically none.
See here:
http://translate.googleusercontent.com/translate_c?hl=en&ie=UTF-8&sl=es&tl=en&u=http://www.matrixhifi.com/pruebasciegas.htm&rurl=translate.google.ca&twu=1&usg=ALkJrhiz2Mhf0UdL48s2vkshifiCVmuMHQ
NAD 370 vs Mark Levinson costing more than 10x more:
No differences were found between the SOUND MARK LEVINSON and NAD.
Denon vs YBA, again, no difference.
Amps really do not make that much of a difference (probably and understatement). If you want good, cheap amplification, you can look at pro gear, which will offer you very good amplification for a fraction of the cost of overpriced audiophile 'junk'.
Another test, this time comparing a pioneer if I remember correctly, vs mega amps:
http://www.hometheaterfocus.com/receivers/amplifier-sound-quality.aspx Again, same result. No difference when tested under blind conditions.
The thing that you think you're missing might simply be in your head. If the Marantz is, as you claim, great, then it's a waste of money to upgrade it.
Or, my advice, buy something with good return policies, and do a blind test yourself. See if you really hear a difference. While I don't doubt that the Dyns are good speakers, they're probably your limiting factor here. I like Dyns, but if you compare their line, I believe their Audience line is their budget line. Going up the line would give better sound quality. Floorstanders often do give you better bass, but the Contour line and the like would probably be more what you're looking for... Anyhow, my guess... Maybe the Marantz really has trouble with the 4ohms and 86dB efficiency of the Dyns in your, possibly large room... I don't know, but usually speakers and rooms is a lot bigger issue than amplification...