I bought the TP Link TL-WR841N router about an year ago and I have to say the performance of the router has been consistently good.
The speed and functionality offered at just about 1k is the best you can get from any brand. I advice every person looking to invest in a router to consider this one as the first priority.
Not single time did I face a random disconnection or decrease in connection speed. Also the quality of the router is amazing and the range is pretty decent. Overall I would say that If you are strict on budget then this router from TP Link is the must buy.