Start with CD player, then Pre-amp, then Amp. Power cord upgrades are the MOST significant improvement. My Electraglides,ie Reference and Fat Boy were the most dramatic upgrades than my $4000 CD Player!! Power cords DO make a difference.Buy them USED and save alot of money.Research them first. All cords do different things in systems. Check out the BMI or Delta Lab power cords on the Auction here at Audiogon. Great cords at Minmal prices that compete with much more expensive manufacturers. GOOD LUCK. Oh, don't forget upgrading interconnects and wires.
Power Cord Advice
I have the following amps in my system, Acurus A250, A200, and A150. Would I realize a noticeable improvement in sound and dynamics with higher quality power cords. Also do other components in my system need upgraded power cords or just the amps. Thank you so much for your help. Rick