If anyone is still able to read this post, I have found a fix for not being able to use PPPoE. I purchased a Netgear N900 router. My DSL connections now work perfect.
Again thank you all for your input. I have not forgotten about your input!
I still had to downgrade my MTU speed even with this super fast router. Thanks to Silver Lounger's information on how to do it I found the speed I needed. It was still the same as it was for the D-L router.