DAC/w Volume control + Power amp or DAC + Integrated?

Doing lots of research for complete new set up from the scratch but very confused about DAC /w volume control section. 
Does the Volume control mean actually a preamp section? So a DAC + Preamp all-in-one box? 
Or are there any DAC with pure simple volume control knob exist? 


One of the systems I am eyeing on is LTA Ultralinear power amp. Source is digital only (Qobuz, local files network streaming via Chromecast audio to DAC via optical, for now) so I may not need separate Pre-amplifier. 

There are couple of options.
1) DAC /w built in volume control + UL Power amp
2) pure DAC + Standalone Volume controller + UL Power amp
3) pure DAC + UL integrated amplifier
 
Which one is the best setup SQ wise? Or Cost-Performance?

Built in volume control affects sound quality of the DAC? 

Is UL Integrated inferior to power amp by a margin?


I would like to go simple as possible because of limited funds (DAC & Amp for < $9k) so assume that going from DAC to Power amp directly is the way to go. All used gear will be more than welcome.


Regards

Arron