I have been using Draytek routers for a number of years and have been very pleased with their reliability - they were more often in the past found in a business environment due to their cost and feature set, but prices today are more reasonable - I do not use all the advanced features on my router, but its nice to have just in case......
I use the Draytek Vigor 2710N which at present has been stably connected for over 2 weeks (when I normally reboot my PC etc).
I too had been suffering with constant dropping connections over the last few months, and without knowing what you have done it may not be the router that is at fault, but another component or indeed your Broadband service- before in my case BT would look at the issue, they wanted and I did change Microfilters, Lan Cables, installed another router, tried the router on another PC, plugged the router into the Master socket (taking the back plate off ) removed all other wireless appliances etc etc.
After all this my ISP escalated the problem to BT and although we did not get back a fulsome report, the problem suddenly stopped and we went back to a stable connection. My theory is that with all the maintenance that BT is doing to upgrade their exchanges to fibre, that something may have been damaged or set incorrectly, but I will never know.
So before buying another router if you have not done so, I would check all the other components in the Broadband chain.
