I just bought on ebay a DBX 234LX crossover. This is a piece of pro audio gear. The thing is loaded with features and will do exactly what I need. My concern is that it will sound clean at the crossover frequencies. Time will tell.
I picked up a pair of 2402H "bullit type" hi-freq drivers. I'm having new diaphragms installad and will build cabinest for them. They'll stack on top of the L100s. It will be a month or so before I can test the setup.