Advice on 4k monitors.

Basically, I am interested in buying a 4k monitor for my Macbook pro retina. I am a student studying Applied Sciences of Audio and Music Technology. When I first got my mac my intention was to get a HengeDock and then just get a thunderbolt display and have essentially a desktop for home and then a laptop for when I'm in lectures. Although after reading into the Thunderbolt display I notice it has essentially the same resolution as my Macbook (Macbook pro retina 13 inch late 2013 8gb of ram quad core i5 with intel iris 1536) and because I have my mac on a stand the screen would be the same distance away from my face so I would start to see pixels which I would like to avoid and sitting at £900 I think it's very over priced. So my attention quickly turned to 4k or UHD but as I understand it my Macbook is only powerful enough to push 4k at 30hz I have no Idea if that is good or not. I only browse the web, watch Netflix and do uni work I do a lot of work on Logic x and Ableton. From what I can gather these aren't too straining for the graphics card.

What I want out of the monitor. Firstly I would like to have the screen the same sort of quality as my Macbook such as colour and what not. I cannot fit anything bigger that 27-28 inch on my desk and I would like it to look premium to a certain degree I don't want it to look like an average monitor. I love the construction of the thunderbolt display. All in all, I want a 4k display that looks as good as my screen on my MacBook that simply just works I don't want to purchase something and be even slightly disappointed.

All of this for a budget of around £500

Can anyone help me?

Lewis