Hey, if you don't have an issue buying Chinese drivers, Lii audio has a new, higher performance version of the (15") F15. The originals cost $400 per pair and the "improved" cost $~$550 per pair. Dirt cheap in any case and if you can build the OBs with a solid live edge. You must take care to get the drivers center up to the height of your listening ear level, and you will be astonished at how great they can sound - on much less than a watt! granted you may want a powered sub for the bottom octave, at least occasionally, as I do, but I find them satisfying without about 98% of the time. They are one listener speakers though - you must be at the focal point. Anything else you build will be much more complex and expensive. I am very happy with my Lii-audio F15s in 28" x 28" solid mahogany baffle boards but on my adjustable stands to raise them to ear level and set the baffle angle to optimum (very crucial IMO). All that said, I'm in the planning stages to build my first pair of Perry Marshall OB "Live Edge" speakers - the cottonwood ones. They will cost a lot more and be a challenge in many ways, but since I've retired, I can spend the time to get it all "right" with whatever baffle material I end up choosing. They will cost a lot less than any commerically available speakers that are competitive in performance I believe. Good luck and let us know about your choices.