You did not mention a budget, so I can only assume (since you are interested in DIY) that you are looking for the most bang for the buck. I heard the Bastani's at the recent NY audio show and was very impressed by their full range and well rounded sound. I have also heard and liked the AN/E speaker kit which is amazing for its size and very musically engaging, although will probably not produce huge sound with a 2A3 (97dB efficient). Commercially, there are Beauhorns and Lamhorns on the used market for 3.5 - 8K which are very nice sounding and 100+ dB efficient. All-in-all my vote would be for the kit version of the AN/E if musicality is your priority.
Good luck!