By the time Orbital released its fourth album, the Hartnoll brothers were strongly tipped as techno heavyweights alongside more commercially palatable prospects like Underworld and Prodigy. Yet, instead of catering to the curious, they presented their most self-indulgent album to date with In Sides. Packaging the 24-minute symphonic track "Out There Somewhere?" with the loopy psychedelic flight of "P.E.T.R.O.L.", they created a most unusual and intriguing collection. Despite their best efforts, though, "The Box" still packed the same insistent rhythm that made "Belfast" such an indelible club staple. --Aidin Vaziri