I have recently heard the Kappa 200 monitors...and they didnt sound bright to me...I dont know how old yours are...
but the 200 is danish made...and struck me as being slightly laid back in character...as far as changing gear...there are 2 options...more tube power...or a more forgiving speaker...ala hi-end british SPendor,Castle,Proac,etc...I too find alot of speakers bright...but the Kappa 200 surprised me....