I just picked up some CD-2 COMP horns and plan on running them with CX54 mids and XXX 6.5" midbasses. The reason I think more people don't try DIY is because it's an "unknown" sort of thing and people get scared about stuff like that. As far as a difference between DIY and "pre-matched" sets, with DIY YOU choose the crossover point, speaker level, power to each speaker, etc. So in the end they're still the same speakers, you just get to adjust them to how you like them. Some people would rather just buy a set of speakers, screw them in and turn them on without tuning and spending hours adjusting little things to get them to sound perfect. To each his own I guess.