Re: xover question.
you don't need to match the tweets and mids for impedance. They each do their own thing. The amp will see the mid and tweet separately even if they are in the same network.
I've heard 2 pair tweet setups be4 (many around here) but I don't really like it that much. Stick to the single pair of tweets, i'm sure you'll be fine.
As for the DLS comp passives, check to see if the original speakers for the DLS are both 4ohms for tweet and mid. If so, I think theoretically you can use it. This is taking for granted that you're wiring your xxx's to a 4ohmload.
I always say it's not really a smart move to use a passive from another maker cause the passives might contain a zobel or an L-pad of some sort incorporated into it. As each driver is different, it wouldn't work the way it should with different passives. If you still would like to use it, then I guess you will need to swap out some parts from the network to match the coils of the new drivers.
I vote that you build your own passive network. It's not very hard to do, provided that you don't show it outside (cause chances are that it's gonna look butt ugly like mine is lol). It MIGHT also be cheaper to build your own than to purchase an expensive passive.
Since you're planning on two sets in your doors, what will your final ohmload be for the xxx's? 1 ohm or 4 ohms?
Sony C90, 210 EQ
Seas 27TDF/C, RE XXX 6.5, custom xo (dyn 240GT sitting idle)
RF 60.2 amp
Soundstream picasso 1400.1D
Bass drive-by's are uncool.