End result is that YOU have to be happy with them.
Enjoyment and happiness come from within. Not being funny at all. I would bet that there are a lot of decent "HT in a box" at best buy that would do the trick, (FOR YOUR NEEDS) for even less than 600.
That said, Since you want quality, but can't hear it just now (you just might later!), then I would consider one of the internet speaker companies:
Axiom
Aperion
Ascend
Onix or Rocket by Onix
I have to be honest, I have never seen or heard any of these brands, but there are LOTS of good reviews about ALL of these speakers.
The one that, in my opinon, has the MOST individual recommendations, is the Axiom. They have (supposedly) very well built speakers, that SOUND great, but have a wood vinyl veeneer. (people say they look great), another company, (read them to see who) uses actual wood finishes, so if LOOK might be more inportant than sound, maybe you would want to consider the real wood speakers.
NOT saying that the real wood is good or bad, or sounds better or worse, but if, as you say, "they all sound the same to me", then go for price and/or fit and finish.
Rest assured that whatever your decision, it will be supported by a group of hard core audiofiles out there!.