Speaker recommendations

Thanks for all the responses.
And you're right I was being too vague.
It seems with the new amp (NAD 375BEE) the Triangle Alteas are being overpowered a bit.
The sound isn't quite as bright as I might like.
Bass response  doesn't seem to be a problem. As I am easily overwhelmed by bass tones. 

i guess I'm not that dissatisfied with my any specific characteristics of my present Triangle speakers but figured maybe incorrectly that if I upgrade to better speakers that sound quality would generally improve. So the basic point of this line of inquiry is what speakers do you folks know about that would provide a somewhat noticeable (I know that is subjective) improvement in overall sound  quality, particularly in the mid and high range for less than $2,000 (incl. used) for the pair. My listening room is about 12' x 16'

I thought I  might upgrade from my Triangle Altea speakers. I  was offered a pair of Canton Ergo 900 DC speakers at a very reasonable price but I won't be able to listen to them first. They loon attractive. Anyone have opinions about them.Thanks

Thanks to all who've responded so far. I sure appreciate the effort. 
In an attempt to further specify so as to take full advantage of all this knowledge out here I will add a bit more info.
My general ear preferences tend toward the highs and away from the lows. Part of this is hearing loss and part may be personal choice bit I do find that when an equalizer is available I seem to always turn up the higher frequencies and turn down the lower ones. Bass tones to my ears seem to often overpower.
Also these theoretical new speakers kind of have to go in a fairly limited location. One foot from the end wall and two and a half feet from the sides of a 12 x16 listening room that is open at the away side to a cathedral ceiling.
Thanks again for all your past and future input.

Last and final question for you audiophiles out there.
I  went to a stereo shop and listened to a pair of B&W CM10 speakers and  really loved them. But they were beyond my budget. I have found a used pair of B&W Matrix 802 Series 3 speakers for sale that I can afford. Before I drive the 2 1/2 hours to listen to them I was wondering how you folks think they  compare  to the  
CM 10 .
Thanks so much