Should I buy a Class A Amp.

I would Love to buy a Class A Amp. I have a Sony Tan-80ES Amp right now and I have had it for 19 yrs. To me it sounds Great but I am curious about Class A Amps. Do they really sound better? I am looking at a Krell KSA 200 Amp right now for $2000.00. It is older then my Sony. Is this too much for such an old Amp? Would Love to hear members thoughts on this.  

Blessings, ..........Don.