Amp improvement since 1994?

Yes, plenty.

Smaller, lighter, more efficient, more power, lower noise levels, more compliante, you name it, improvements pretty much in every way. Technology moves ahead significantly in all ways in 20 years.

Csontos,

Of course,there is no exact answer. But there are many very high quality amps out there from many reputable companies that leverage various technical advances available these days not available 20 years ago. The best general example of progress in amp technology in ercent years is Class D amps that are up to the task of truly bringing out the best in smaller full range less efficient speakers, that years ago required large heavy monster amps that most would not have wanted to deal with, even if they could afford them. Nowadays, there is no reason one cannot find an amp capable of driving most any speaker to their maximum potential with just a modest investment. 250w/ch to 8 ohms or more is often NOT overkill for best results.