Have a look at Pro-Ject Audio systems.
You will most likely have to go with a stereo system to get your desired look, but this is not a bad thing if you use your Apple TV for music and podcasts as much as Films.
http://www.whathifi.com/review/pro-ject-stereo-box-s
http://www.project-audio.com
You will need a Dac too. I use an Arcam rDac which is very good and probably meets your minimalist look. It is small and simple and always remembers its preset so I never physically touch it. I think it is a bit blocky in its proportions whereas the Apple Tv is an elegant shape so I put it behind the TV. It is so small you would not know it is there.
Arcam Stereo Amps are good but quite large so you probably would not like them. The Arcam Home Cinema ones are huge. All Arcam products sound great and are top quality.
http://www.arcam.co.uk
I use a good stereo amp from arcam and I prefer the flexibility for music and movies. I am never disappointed watching films and you can buy 2 top quality speakers for a lot less than 5 or 7 top quality speakers.
These are Arcam Muso Loudspeakers which are quite small and chunky aluminium which are quite Apple Like in design language.
http://www.whathifi.com/review/arcam-muso-logo What Hi Fi don't seem to like the look but I do; very simple and unobtrusive. They refer to speakers like these as style speakers to please your wife, which makes no sense to me a bit like saying architecture is not important. I have a set. They sound great. You can buy them singly for about £150.