Anyone who is seriously interested in '70s soul and funk should own at least three or four Average White Band albums. But if a person insists on allotting himself/herself only one AWB CD, this is the logical choice. All of the essential hits -- everything from the sweaty funk of"Cut the Cake,""Pick Up the Pieces," and"School Boy Crush" to the unapologetically romantic"If I Ever Lose This Heaven" -- are included. Though most of the selections were recorded when AWB was still very much in its prime, a few were made after the Scottish band had peaked."Let's Go 'Round Again" (1980) finds AWB taking a glossy pop/disco approach that's hardly in a class with its earlier triumphs, but is likable enough. Most of the selections, however, aren't simply decent; they are excellent