Floor Standing Speakers That Would Sound Good With the NAD Integrated Amplifier.

3 grand buys a lot of speakers and there are many dozens of new models to choose from.  Is there anywhere you can go and start auditioning?

Also, which NAD integrated do you have?  They make many different integrated amps at all different power output levels.  It would make no sense to recommend a speaker that your amp could not properly drive.

Oooops, I forgot to mention. I have C375bee Integrated Amplifier.

Thanks for letting us know which NAD amp you have - the big one at 150 wpc into 8 or 4 ohms.  That leaves dozens and dozens to choose from that your NAD will properly drive.  And they all sound different!  Speakers are way too subjective for anyone to give you a meaningful recommendation from the internet - all you'll get is what someone already has or wants to have.

Again, do you have anywhere you can go to start auditioning speakers with music that you are very familiar with?  Make up a sort list of those models within your budget whose sound you like.  Good luck.

Give Ty Lashbrook with Tyler Acoustics a call. He's one of the "good guys" in the business. I own two sets of his speakers and they perform great with anything I have put in front of them.