Never heard any DLS, but I'm sure there are reviews on here. Regardless of the quality you can maximize the performance of the speaker(s) by sealing the doors properly and building a good baffle. If you are not using processing, then keep each front tweet the same distance to your ear as the woofer if you can (that doesn't mean it has to be next to it).
Going active can mean using digital processing of the crossover points and slope or can mean that plus EQ, TA.
To use active crossovers you will need separate amp channel for each speaker. For the other 2 processing features you can use TA with quasi-active setups and EQ with any setup (although still more effective with separate channels).