amp upgrade


Hello all. This is my first post! My system is as follows (mixed Home Theater and Two in Channel in one):

Arcam BDP 100 (cd analog out to preamp)
Rogue 99 Magnum with custom HT Bypass
Rotel 1056 Home Theater Receiver
Rotel 1070 amp
B&W CM4s
MIT AVT3 speaker cables
all kimber timbre interconnects

*I listen to mostly Jazz, some folk

My question is i am looking to upgrade my amp...I am only willing to buy used (cost). I am strongly considering McIntosh (e.g. MC 2105) and Bryston (e.g. 3b). My question is also will both of these examples (which are both 25 years old) be noticably better than my rotel which is probably about 8 years old. Then what other amps should I be considering? Thanks so much for your insight!
scifidelity
okay, what about my rotel 1070 amp vs. a newer model bryston 2b or 4b? (2007 or later)
Hello Scifidelity, This thread will prove most beneficial to you if you answer Rar1’s very appropriate question: "Is there something about the overall sound of your current system that you are looking to change?"
Phaelon- thank you for pointing out that question that neglected to answer. Apologies to Rar1. I really don't know enough about this yet to know what i want in terms of sound. But I will try to explain...I really like warm, real, nuanced sound. I want to feel like the performers are in front of me and that the sound is not coming from a L and R speaker, rather from all over (is this called sound staging?). That being said i also appreciate range and from what i have read, many think a tube pre mixed with a tube amp loses the tight bass that SS amps provide.
In my own experience, it is probably more likely to get breathe of life and soundstaging with tubes...stereotypically, that is their domain. SS typical domain is accuracy, linearity and yes, propulsive bass. To be clear, you definitely CAN get propulsive bass from tubes, and you can get breathe of life from SS...u may have to look a little harder, thats all.

I have settled on tube pre with SS power for the last 5 years or so and am very happy. i was very happy with tube power and would not have changed except my speakers got bigger and more demanding and i wanted endless reserves without tubed monos. I run CJ with Class A solid state.
I used to have a 1070. The Bryston would be a step up, but that doesn't sound like where you want to go. Since you've already got the Rogue 99 preamp, have you considered looking at the Rogue amps? They seem to offer good power/price performance and are well regarded. You'd get synergy between those two components and any number of their amps would easily drive your speakers. 90db @ 8ohms is a pretty easy load. 50 Watts of good tube power would probably do the trick.