Running a two monitors from an iMac

[The_Abyss]

I'm still very new to using an iMac so please forgive what may be a set of basic questions.

I've recently purchased a 2011 27" iMac, moving from a 2 x 24" PC system. I really miss two screens but love the Apple screen. So I'd like to get a second monitor and go back to dual screens. I've searched around and have found a number of conflicting answers so wanted to ask tap up the experience here:

- can I use another iMac as a second screen, as the prices for those seem comparable with a Thunderbolt display?

- if I use Thunderbolt or Mac, can the sound still output to both screens?

- what are the dual display options like under OSX? Can I, like Windows, set different backgrounds, drag across both displays?

- if I end up getting a 2010 or 2013, or basically different screen / iMac to me 2011 model, are the screens pretty much the same, or am I going to find inconsistencies in brightness and colours?

Thanks in advance!

 

[The_Abyss]

Very useful, thank you. I didn't realise the current Thunderbolt display was so dated considering the price premium it commands. I'm a bit OCD when it comes to having everything the same and just so on the desk, so I think I'll look for another 2011 iMac and try hooking that up. The price seems to be about the same as a Thunderbolt display.

Thank you again.

 

[The_Abyss]

Thanks Fr0dders - I'll keep an eye out.

 

[The_Abyss]

But the external display won't match. I think that was the OP's issue.

Indeed. Whilst I can see the benefits of a 4K screen I find the current iMac screen more than good enough, and want some aesthetic consistency on the top of my desk.