Hi graevine and welcome to the forums
The most important stats that you can get from your router to help you understand what is going on with your connection are
~ connection (sync) speed
~ SNR (Noise) margin
~ Attenuation.
There is a guide to help you understand what they mean on my
Interpret your line stats page.
However, if you want, feel free to post your stats in here and someone will possibly comment on them.
As regards to the errors, I dont know of a site where which gives a consise explanation of what they mean in simple format.. possibly the best explanation is on wiki (unless someone else knows different).
http://en.wikipedia.org/wiki/CRC-based_framinghttp://en.wikipedia.org/wiki/Forward_error_correctionhttp://en.wikipedia.org/wiki/Header_Error_CorrectionBasically lots of errors isnt good as it means that your router at some point hasnt received all the packets transmitted correctly. This in turn leads to slower speeds, as you router has to re-request the data.
Seeing a few of these errors on their own isnt really much help when diagnosing.. Im on a good line close to the exchange but even I see errors from time to time. - When it does cause a problem is when you have a lot of these (100/1000s) within a short time span.