Plecos do need wood in the tank. The panaqes actually have to eat the wood (royal, clown and others) but the other species all scrub on wood to provide fiber in their diet. You can keep plecos with cichlids, but the less agressive the cichlid, the better as some of them do go for the eyes. Individual personalites of fish differ, so no matter what, you'll have to watch your tank untill you know if they are getting along.
I'm glad you're going to pass on a zebra, by all accounts, they are difficult to keep. Gold nuggets are also pretty sensitive fish, so you might want to start with a more hardy plec. Commons, albino or not, are tough as nails, and often have a pleasing personality. Bristlenose are another good choice, have you looked at veiltail bristlenose? Might suit your exotic tastes a little better, while still keeping with a hardy and avaliable fish. Royals are pretty durable if they get past the first month in your tank, and make an attactive centerpiece fish. Rhino plecs are muddy in color, but have an almost comical plumpness to the body that makes them fun to keep. This is the tip of the iceberg in plecos.
Oh yeah... since you liked the zebra.. have you checked out scribble, or king tiger plec? Queen arabesque?