I somewhat find myself in a predicament, I am in upgrade mode, but am not feeling too rich these days. I am on the market for a new amp to power my Martin Logan Aerius Speakers and my only 2 choices right now are an Aragon 2004 (100W/ch @ 8 ohms, 200W/ch @ 4 ohms), or a Parasound HCA-1500A (205W/ch @ 8 ohms, 315W/ch @ 4 ohms)I guess it is the 4 ohm rating that is more important as my ML's are rated at 4 ohms. This is my first step into seperates, and I am in dire need of advice from impartial and experienced people as yourselves, I am not able to audition both amps, just the Aragon maybe. I am currently using a Pioneer Elite VSX-29TX (120W/ch @ 6 ohms, n/r @ 4 ohms) to power these, as I just upgraded from PSB Stratus Silvers to the Aerius. I will be using the Pioneer for a while as a pre/pro. Both the Aragon and the Parasound are used and pretty much the same price. I keep hearing I will notice a vast improvement over my Pioneer Elite with a good amp, but just can't imagine it, I guess we'll see! I would appreciate any input, thank you!