Looking for one with playback purposes. Budget 2k. Might be interested in x4 or the mk3, but any advices might be helpful as I am pretty new to this stuff. I do have my own dac, check out my sig. I think it does have pre amp function. Both of these are powered speakers, right? Do I need another power amp for these? Thks guys please advise, I am also open for suggestion with powered speakers from other brands if my budget permits.