ALSA is very good.
I've been using ALSA for several months, and my experience has been very good. The sound quality is MUCH higher on my OPL3-SAx than it was with the OSS drivers, and it was in fact easier for me to install. I've reccomneded ALSA to several people since then, and they've all preferred it to OSS as well.
Ignore the naysayers here, ALSA is a very good thing and you should give it a try.