I'm not familiar with the DLS set, but I own a set of EF-61CFi and they are surely impressive. I haven't run them with the Satnet fives, only active off a 9.4.
Really depends what your after. For overall SQ i would get the up6's. Great sounding set. The Ef's sound good as well but the dls set sounds more natural. The ef set has the better midbass and can get pretty loud if you require the added volume.
both are great speakers, i have heard both and i would say get the Cdt with FG mids over the CF, the Fiberglass mids have yet a better sounding quality on the midrange and midbass and can be had for only $199 from an authorized dealer.