Hello. I'm debating between a 27" 5K base model 2017 iMac or a 27" 4K monitor (still debating which models). I recently purchased a 2017 base model 13" rMBP. I would be using this rMBP with the 4K monitor attached via USB-C in clamshell mode plus a BT keyboard and mouse. I do have my concerns if this setup would be a smooth one where I can consistently wake my closed rMBP by pressing a key on my keyboard. I'm not entirely sure how I'd get my ethernet connection involved in this setup. (I don't want to buy dock.) Plus I'll need to connect some USB-A devices and my computer speakers. My concern with the 27" 5k iMac is the glossy screen. My home office has a series of windows behind the screen which often times will reflect natural light. It's essentially a home office/green room with many plants behind me. It's truly the only place in my home for a desktop computer. Right now I'm using a 20" ACD which is matte. I'm also curious how sharp text can be with a 27" 4K monitor/rMBP vs. a 5k 27" iMac. A rather popular Amazon review makes the case that a 27" 4K monitor on a Mac is not nearly as sharp or 'retina' as the 5K iMac. If you agree/disagree, I'd love to know. Cost is also a factor. I can get a new 4K iMac for $1600 versus say a 4K 27" monitor for roughly $600 plus potentially a USB hub if necessary. Thanks in advance for your answers.