Hi guys, I currently have iMac 21" mid 2011 (2.5gHz i5, 8gb ram, 500gb HDD, 6750M 512mb DDR5 GPU) and 13" rMbp early 2015 (2.7gHz i5, 8gb ram, 128gb SSD, intel HD6100). I am now thinking to sell my iMac and just use my rMbp + external monitor instead. I don't like the idea of having two computers cos it feels like wasting resources and I cannot find a good way to sync data between these 2 macs except using cloud services (let me know if i am wrong). I also live alone so don't think I can donate my iMac for some else to use. I believe I can save up to $300 if I sell my iMac and buy a normal IPS full hd monitor (Dell S2340L or LG ultra wide 25UM55-P). I might need an external HDD also and I already count that in. Anyone has face this dilemma before? Any comments will be appreciated. Below is some of my background and consideration/questions. So should I sell my iMac? Anything that I may missed out that can convince me to keep it? 
Background: I am using laptop or pc mainly for video streaming, browsing, remote desktop for my work, simple word/data processing, play some light games, beginner video editing. I only play games like TF2, GW2, LOL or DOTA2. For video editing, I only using GoPro video software (didn't really edit 4K video though). Since I have been using iMac for a while, I prefer to have bigger screen than 13" mainly for playing games and video editing. I also bring out my laptop twice a week so i think I need laptop for portability.
My consideration/questions:
1. Based on Geekbench, iMac mid 2011 only has slightly higher score (7237 vs 6938). Can I say that my rMbp is as fast as my iMac? my iMac still using normal HDD so rMbp will do feel much faster in day to day use.
2. how bout the graphic card? is intel 6100 enough for playing my games and GoPro video editing? will I force my rMbp work harder if I play games and video editing? any potential heat issues?
2. anyone can comment on the overall performance comparing Dell S2340L/LG ultra wide 25UM55-P with iMac screen? I am just afraid that i will be disappointed with the external monitor since iMac apple screen is famous for the quality. btw I don't want to spend much money with the external monitor (if it is too expensive, might as well I keep my iMac right?)
Background: I am using laptop or pc mainly for video streaming, browsing, remote desktop for my work, simple word/data processing, play some light games, beginner video editing. I only play games like TF2, GW2, LOL or DOTA2. For video editing, I only using GoPro video software (didn't really edit 4K video though). Since I have been using iMac for a while, I prefer to have bigger screen than 13" mainly for playing games and video editing. I also bring out my laptop twice a week so i think I need laptop for portability.
My consideration/questions:
1. Based on Geekbench, iMac mid 2011 only has slightly higher score (7237 vs 6938). Can I say that my rMbp is as fast as my iMac? my iMac still using normal HDD so rMbp will do feel much faster in day to day use.
2. how bout the graphic card? is intel 6100 enough for playing my games and GoPro video editing? will I force my rMbp work harder if I play games and video editing? any potential heat issues?
2. anyone can comment on the overall performance comparing Dell S2340L/LG ultra wide 25UM55-P with iMac screen? I am just afraid that i will be disappointed with the external monitor since iMac apple screen is famous for the quality. btw I don't want to spend much money with the external monitor (if it is too expensive, might as well I keep my iMac right?)