[tor-relays] Unstable router

[humbletoruser at Safe-mail.net]

Hello guys,

I'm hosting a tor relay at home.
My router is a Fritz-Box  (this one: http://avm.de/service/fritzbox/fritzbox-7362-sl/uebersicht/ ) and the internet connections is really unstable.
Frequently the connection breaks. Not only to the internet, also the local network is down till the router reboots.
Is there a better solution for routing a DSL connection?
A better router or a way to replace the router with the computer running the tor node.
Any hint is appreciated.

Thanks in advance!

Another question:
If I'm acessing my side through a .onion address theres no need for ssl/https as the traffic is encrypted anyways, right?