I want to replace my current router and my budget is 3k-4k. Well cheaper the better. I have no idea whether I should be getting dual band or not tbh. Router will be and should be on for 24/7. There are hardly any power outages, so I would never turn off my router. One laptop and one raspberry pi will be connected to it always. And often my iPhone and iPad Air will be connected. It will be downloading torrents all the time (via connected RPi or directly connecting HDD). I would like it to stream 1080p movies (those 6-8GB prints) to my iPad Air or to my laptop or to both sometimes. The source may be from external HDD connected directly or via Raspberry Pi.
I was suggested to NOT go for N13 (or N14) which cannot do both simultaneously i.e. download and stream. So next good option was WDR3600 from TP Link. But many reviews said range is poor in 2.54Ghz also.