Diy is the way to go for high performance speakers -- unless your bank account is superlative!
I strongly second Slaufer's recommendation for the Orions. This is a VERY complicated and elaborate design; easily amongst the best sounding dynamic speakers commercially available -- if not the best (and I've listened to many -- OK, not all:)).
Also, very strongly recommend CLueless' visiting list; I would add and also recommend you visit JPO's site and look up the Point 75 project -- another good design by Troels Gravesen that has a dipole midrange.
Good luck!
I strongly second Slaufer's recommendation for the Orions. This is a VERY complicated and elaborate design; easily amongst the best sounding dynamic speakers commercially available -- if not the best (and I've listened to many -- OK, not all:)).
Also, very strongly recommend CLueless' visiting list; I would add and also recommend you visit JPO's site and look up the Point 75 project -- another good design by Troels Gravesen that has a dipole midrange.
Good luck!