Well I've actually only got a budget of 700, but my company is willing to cover me for half of the cost. Looking for a 4K display with not much requirements other than it being worth its value and hopefully IPS (if IPS and a high end TN have a significant difference). It has to be compatible with the 15" 2013 rMBP. I saw a few models on Apple's help document but I was wondering if there were lesser known models which have been tested to work. Thanks! Also has anyone tested the 28" TN panel by dell? http://accessories.us.dell.com/sna/productdetail.aspx?c=us&cs=19&l=en&sku=210-ACHO Also welcome are suggestions for me to use the budget for other accessories to enjoy with the new display.