I think for the most part you had to be around at that time to appreaciate quite a few of the older bands, most of its just too primitive for ears that heard the more recent stuff first. But if you must try give Look at Yourself or Salisbury a shot. Some interesting pre-metal grooves and ideas here and there. The title tracks from both are examples of their prime material, Look at Yourself very much like the drivin Maiden gallop riffage and Salisbury quite a interesting progressive rock piece that I still swear the label must have brought outside arrangers in for, I love Mic Box's early shred goes toward the end and the fact that you can hear him click the old fuzz box switch each time... now thats nostalgia... LOL
edit: that might actually be the wah pedal switch you can hear
