Hello,
Glad to hear some other people are enthusiastic about the Tannoy Arena. It seems to be something of a niche product, maybe due to the looks, which I think are great but aren't to everyone's tastes. I wish more people would give it an audition, as it's from a good British mark, and a great performer.
I have them with a Maranz, but did hear them with a decent Denon, (can't remember number), and was very impressed. Didn't really debate getting the Denon amp, as I'd already got the Marantz, but it might have been a close call.
The clarity and detail that gets piskced up is great, and even in TV or film it really locks onto music, even background music, and brings it out, (without overpowering the main sounds). I end up getting quite into bits of music on adverts and other programs I'd never even noticed before.
I've been impressed with the Arenas, and thought they were much better than a lot of seemingly well-respected style systems that I reviewed, that were often more expensive. However, I didn't have any proper hi-fi stuff before, so wasn't sure if they were only comparatively good, and I wasn't getting a real hi-fi experience, so it's good to hear your comments regarding their musical performance with reference to your previous stereo system.