So I am about to purchase a Parasound HCA-1500A amp that I have found at a good price. Right now I have a BK ST2140 amp that I feel sound great. According to both amps, both utilize a class A predriver but the Parasound uses a JFET cascade configuration wither as BK does not give say for unknown reasons. Both utilize MOSFET output stage but Parasound has a high bias A A/B. My question is, based on experience, would be the better amp? Should I stay with the BK or get the Parasound? My current system is in my sig.