I've just done a quiet-line test with the new router, and I've noticed something odd, which may have to do with the problem..
I can hear the ADSL on the phone line, when I disconnect the modem, the noise goes. when you reconnect the modem, you can hear it do the handshake and then eventually making a racket.
its very quiet though, you almost wouldn't notice it if you just listened to the dial tone.
I'm presuming this isn't normal and could factor into my attenuation? though I think this issue might be only one way, I'm hearing my modem, but not the dslam, so only effecting my upload? this is my un-educated guess!
Still waiting on the SNR reset too, its been provisioned but its been the weekend so its too be expected