I don't know anybody who uses M-Audio anything.
Well,I recall reading over @ gearslutz.com that Butch Vig said he uses a pair of M-Audio EX66 in his home studio,,,he even posted pics of his home studio set-up as well...
Also I vaguely recall seeing a pair of EX66 in the background of the studio Josh Homme & Jesse Hughes used during the filming of "The Redemption Of The Devil".
So there are at least a couple of "pros" out there who use M-Audio,,,and apparently those EX66 are the ones those sorta folks prefer.
Like any brand of gear there are usually varying levels of quality in their given product lines throughout that co.s history.
But as per SOP those specific M-Audio's (EX66) have been discontinued,LOL,yeah go figure eh.
And I dont have anything to say 'bout those BX8-D2 specifically myself.
So enough 'bout M-Audio for now.
Tons & tons of reading on studio monitors out there if you go looking for it,heck a person could spend years reading all the studio monitor threads over @ gearslutz.com.
And there are plenty of other studio/recording forums like that one as well.
But most everyone will tell you to get out and go audition as many as you can before pulling the trigger,ie: hearing is believing.
Most music stores should have a good cross-section of vaious brands and budget levels of active monitors to check out & audition.
But to give any serious suggestions really requires us having more detailed info,like potential budget and room details and what-not.
Also,there's the option of passive studio monitors as well,no reason passives have to be floorstanders,they come in all sizes & shapes.
Some pros prefer passive monitors as they're typically quieter than some active monitors.
I kinda went that route (smaller passive monitors) with my desktop PC based headphone/nearfield rig.
That HP/NF rig sounds superb too.
The possibilities are endless really.
FWIW
Bret P.