Which 2 WAN Aggregated Gateway Router to Choose?

Question

Mikrotik

It is planned to connect two providers (1st - 30 Mbps, 2nd 20 Mbps) to the office. The task was to install a router connected to two providers at once and performing channel reservation and channel load balancing (if I choose the right terms, this can be considered a wan association in terms of speed for local network clients).
There are options: Mikrotik RB951, Zyxel USG100-PLUS , Zyxel ZyWALL 110 , D-LINK DSR-500 .
If we ignore the difference in cost between Mikrotik and the rest of the candidates, which would you choose? Perhaps you would have chosen other options, or at least not chosen these (why?).
Now I have CentOS (iptables, squid etc.), I configured it myself, everything suits me, but for various reasons (including dimensions) I want to refuse it.
I really need advice.

Answer 1

From iron solutions Mikrotik.
But I advise you to finish your Linux router, it has much more potential in terms of managing large networks.
2 Providers can be plugged into both Linux and Mikrotik.
And here and there you can write a load-balancing / channel-reserving script
. In Mikrotik, load balancing is done using marking.
In linux through tables.
If you have 2 channels 30 and 20 you won't get 50. No equipment.
A maximum of 30, and then if the traffic goes during balancing on this channel.