Well, I'm a networking newbie, and I haven't used any of these things. (I've only demo'd the Airport with an iBook wirelessly.)
All I can say is that for Home PNA make sure you're getting the most recent 2.0 standard stuff, since it runs up to theoretically 10 Mbps (reality more like 4 apparently). The old standard didn't even hit 1 Mbps. I dunno much about the individual brands though. Netgear (I think) is also selling a box which converts 10BaseT to telephone lines as well, for those people who already have standard RJ45 10BaseT jacks in their computer (ie. laptop users). (The cards HomePNA provides give you an RJ11 jack that you plug directly into the phone line.)
By the way, you can still use your phone, and apparently use DSL too at the same time.
That said, I personally am looking into wireless with an Apple Airport.