I am planning on building bookshelf monitors for L/C/R and surrounds all the same. I wanted to use the new VIFA XT25TG-30 1" Dual Concentric dome tweeter and the VIFA M18W0-09-08 6.5" woofer. I would like to build a sealed box as I am using a nice Tempest sub to fill in the low end. I need some suggestions on choosing a crossover design or trying to figure one out. Norh uses these drivers in the Prism line but I can guess they wouldn't tell me their x-over design. Is there software available to help design one. Another option that probably would be out of my budget for now but an interesting design. Purchase 5 premium 2 way active x-overs (Audio Control or RANE perhaps). 2 ATI 1505 or other nice 5 channel amps. An Outlaw 950 pre/pro to run the amps when available. Run the tweets and woofer on seperate amps kind of like a pro sound setup. This would certainly take out the interactions that a passive x-over has on drivers and how the network effects the drivers sound and dispersion. What do you all think?