Best monitor under 5k?

I second the De Capo i's recommendation . But beware that any speaker, for low level listening , must be accompanied with a system that will give you the detail , resolution and dynamics at that low volume level ! The speaker , alone , may not do it .

Dynaudio 1.3SE was one of the best monitors i've owned. A steal used.

I also like Wilson Cub IIs if you have the space and $...

perhaps the answer to the question you've posed is to ask the question? what is the associated electronics, and your taste in music? other than the established price parameters...

My associated equipment is currently...

Ayre V-5Xe amp
Ayre K-5Xe preamp
Modwright Platinum Truth Sony 999ES
Pranawire Nataraja Interconnects
Synergistic Research Resolution Reference X2 speaker cables

I tend to listen to a great deal of female vocalists, new age, and movie scores..

Diana Krall, Norah Jones, Josh Groban, Yanni, Enya, etc

Green Mountain Audio Callisto's should be on your short list to audition at $2900/pair