Ive used auto Celulose for car alignment, however my friend owns a garage and he uses them all the time, he says they are always consistantly good.
Elite seem to be more of a specialised/custom paint shop, never used them but they seem to have a good reputation.
none of this is based on personal experience, just advice from friends in the trade, Ive always thought any body work I needed would go to one of these two or Prestige. My freind just had his Lexus done at Prestige where somebody keyed it, the job was absolutely perfect, my friend is incredibly fussy and he was well pleased with the job.