Need recommendation for dual WAN Gigabit router

Hi there!

I need your help for choosing the right router for my office.

- 50 concurrent users
- 2 WAN combined approx. 50 Mbit/sec
- Load balancing for internet access, limit speed for a group of devices
- Gigabit lan
- No VPN used

I searched the internet and found some interesting routers such as Cisco RV042G/RV320, Linksys LRT224, TP-Link ER5120. But I don't know which one suits my needs most.

Thank you in advance