I recently purchased a late 2013 Retina Macbook Pro on ebay (2.6GHz, 1 TB SSD, 16 GB RAM.) My new Dell 27" IPS 4k monitor arrives tomorrow. My plan was to use the rMBP as a desktop with the option to take it on the go as needed. I like the 1TB SSD. In theory, I like the ability to take it with me, but I don't travel that often and I do have an iPad. I don't require too much power, but I do need a lot of screen real estate. I am starting to wonder if I am better off with a 5k iMac instead. My biggest concern is that the 4k monitor will not have enough real estate in "best for retina" mode (looks like 1080p) and I assume that at native resolution the 4k monitor with be difficult to read text. Cost of MBP was $1950. Monitor was $620. Laptop stand $50. ~$2600 total. iMac would be around $2800 (512 SSD, i7 processor, student discount, no tax in Delaware.) plus cost of aftermarket RAM upgrade. Thoughts?