Dust???

Thanks for all the responses,

Since prevention would be ahead of the game (? better) would covering the components, or placing a Plexiglass "case" around the rack between listening sessions be better? My area isn't any more or less dusty than I'm sure is average, but I'd like to minimize/prevent all dust. Thanks.

It all depends on wether or not you leave your equipment on all the time and how hot things get. The heat trapped by a plexi-glass cover will be more damaging than some dust.
My house was dust central until I bought an electronic air cleaner for the furnace. It may be somewhat expensive but in my case it was well worth the money. Goodluck.

"Since prevention would be ahead of the game"
I would recommend showering more since most dust comes from ..... us. =:-)