David,
Give stands a shot ... no small monitor will ever sound as rich or as pleasing as a full range speaker that sports a 10" or so woofer. It's just the physics man. It is not that small monitors can't sound good ... they can ... but they will not be as rich sounding as your Advents.
I have two pair of the AR 302's ... these were reissues of the classic AR 5's from the 60's ... very similar to the original Advents. I use one pair in my main system and the other pair in a 2 channel HT system. It is tough to beat their warm, rich, full sound and I have owned many a small budget monitor ... EPOS 11; B&W 302; Wharefedale Diamond 8.1 ... the only ones that begin to approach the AR's are the NHT SB2's ... and I believe that is because they are acoustic suspension speakers ... just like the AR's.
If you want to read more about
classic Advent speakers , give the underscored web-site a look.
Regards, Rich