Most detailed speakers in 1K range?

Used B&W P5 or P6

Used B&W P5 or P6

ACI Sapphire III, it can be purchased as DIY kit

Try Apogee, for example the Slant 6, Centuar, or even better, the Stage. Astonishingly open (especially the Stage & Slant 6), requires a fair amount of fussing with cables & room position as well as a GOOD 100 watt amp but worth every penny. Good luck

If you can stretch your budget just a little, you might find a pair of used Merlin TSM-SEs on Audiogon for around $1200. These are certainly "at the expense of bass", but what you get is certainly worth it!