Best Speakers for 2channel Music

Magnepan MG12's or stretch the budget for MG1.6's.

Currently I have a harman kardon hk3480 reciever and a 12 inch sub. Not too much high tech or expensive stuff.

Magnepans require too much power for you Harmon Kardon, and the placement of them requires alot of room from back wall. They are great speakers but too many suggest them before they really know if they are ideal.

Using a receiver may require you to look at easy to drive speakers . Receivers generally do not have much power . Their stated wattage listings are dubious at best .
Try to find something in the 90db. range .
I had some nice 88db. speakers on a receiver . When I moved to seperates , it was as if I had taken a blanket off of my speakers !

Good luck .