My home is far from DSLAM (approx 2km). It is of utmost importance to me to squeeze the last bits per second, mostly on the up-link side from my PSTN lines, as I am teaching online using a webcam. No other feature is of any importance (apart stability) provided the cost is reasonable - under let's say £200.
Which ADSL 2+ modem to get.
P.S. I do not think we have ITU G.992.5 Annex M in Greece yet.