I've used the older Draytek Vigor 100/110 ADSL modems at a few sites, never an issue with PPPoE. I'm sure the V120 is just as good.
I've just installed Debain Squeeze on my laptop. I tried Debian years ago, but had problems getting things working on my laptop.
What a difference a few years make.
Out of the box, the wireless works, as does the sound and brightness button controls; the only thing I had to do was add the non-free nvidia driver. In it went, and everything's hunky dory!
If you're installing off a live CD, use the wired ethernet rather than the wireless as even though the live CD works with WPA wireless, the installer routine only understands WEP. Once installed though, wireless is fine.
If past experiences had put you off Debian, it's all changed now.
The reason I tried it is one of my hobbies is computer music. I used Ubuntu but there were problems with the libsynth libraries. These were fixed in the upstream Debian repo, but I found out that they wouldn't make it to Ubuntu until the new release. I patched them in manually, but it was an aggravation for me.
Anyway, I've still got Ubuntu and Debian on dual boot, I'll give it a few days before I make the jump and go full Debian but it's looking really good.
Rosegarden for me as I mix midi and audio in one sequencer.
Qtractor is superb also.
As for synths fluidsynth loaded up with soundfonts is great. Search the repos for ladspa plugins and the world is your whelk.
I've installed and run pppoeconf, and it scans eth0 for a PPPoE access concentrator but doesn't find one, even though I've checked I've plugged the ADSL line in and the DSL light on the modem is a solid green, not flashing, which would seem to indicate it has an ADSL connection. Anyone any experience with pppoeconf or any ideas?