If it sounds good to you, isn't that all that matters? Now if your trying to get your system to sound neutral and non-bright, then your going to have to hear other well established systems along with having trusted audiophile friends help you tweak your setup.
Is it too bright or is it high resolution?
It has been said in the forums that one mans bright sounding amp is another mans high resolution amp. Some amps and preamp combinations can deliver a high resolution presentation and to others this may be considered too bright sounding. Is there a fine line that can distinguish between the two? Personally I like very revealing & the fine details delivered but the wife says it sounds a tad bit too bright.