[H] do I need a new router?

[Winterlight]

I have a 8 year old TP-Link gigabit router on my home./office LAN 
that works just fine.  I don't use it for wifi...I have wifi 
disabled. I use a Ubiquiti  Unifi AC-pro for wifi. I wasn't looking 
to replace the TP-Link router but I see Newegg has deal on 
a  Ubiquiti Networks ER-X-SFP-US Advanced Gigabit Router with PoE and 
SFP. Other then the fact that it would match up with my wifi 
hardware, and it will come with up to date firmware which may or may 
not have better security...do I really need it? Are there other 
benefits I am not seeing? I need a SysAdmin's advice!