what amp under a grand?

It may not be your amp, but if it is, then ditto on the McCormack. I'd vote for the 125. The "McCormack sound" may not have the very last word in HF extension or air, but their amps are very highly regarded in every other respect. 125 should be slightly more transparent and neutral than the DNA 1, if both are stock.

McCormack dna 125 or rotel rb 1582?

Your speaker is very musical and could certainly be described as a tad dark sounding. A higher power class D amp would be the best choice. It will balance out the speaker perfectly and for little money. You can buy brand new monos from Ghent Audio for $999 with a trial period.

You can find used Bel Canto, Nuforce etc amps that would also work wonderfully.

I use a Bel Canto Class D amp with mine and the combo is perfect.

Your speaker can certainly sound a tad dark and muddy with the wrong amp. You want a crisp, clean, fast and neutral amp for your speakers. You want power and your speakers react well to lots of power. Class D is not always the best choice, but in your case they would be ideal.

well bel canto class d,ghent audio gas500b (dual mono) rotel class d or jolita 502p. which would be the best amp for my set up? and future set ups?

Not tubes for your speaker. Ghent is affordable and the trial period makes it risk free and fun.

The others may be out of your budget. Keep an eye out for used ones.