To pre or not to pre

+1, noble100. 
I am in the camp of preamp matters. I hate to break it you but the VC in your Mytek is nothing more than a bottleneck in your system.

With a high quality preamp you will hear incredible dynamic range and the micro-dynamics. If you want your music come to life, add a preamp.

     I generally and formerly agreed with the guideline of not adding a component if you can avoid it.
     However, I recently needed to add a preamp to my system, mainly for the switching functionality between a Lumin D2 dac/streamer and an Oppo 205 both with balanced xlr outputs.  I bought a pre-owned Levinson 326S preamp with remote.  I previously used an Oppo 105 as a preamp but needed a preamp for switching when I added the Lumin.  
     I was very pleasantly surprised that I perceived this preamp as actually lowering the noise floor, probably due to it immediately conditioning the AC current upon input, enhancing the detail level and creating a wide and deep soundstage illusion on good recordings that presented solid and stable 3 dimensional images that are very realistic, natural and enjoyable.  
     I also found the volume control on the front panel and remote to be very smooth and finely adjustable, things I rarely even thought of previously.  This preamp sounds very neutral overall but I suspect it may be adding a subtle something since my familiar music sounds even better through this unit.  
    I believe I just may have become a convert to using high quality preamps in my system, which somewhat surprises me.
   Marcosb, I suggest you try and borrow a high quality preamp for a few days from a local shop and determine whether you enjoy your system more with or without an added high quality preamp.  I suspect the quality level and price will be closely related but you just may surprise yourself and decide it's worth it.
 
Best wishes,
    Tim

The sonic impact (good and bad) across volume controls alone is seriously under-accounted for by many.

+1

I would always use a preamp.  The sonic impact (good and bad) across volume controls alone is seriously under-accounted for by many.  Assuming you get better sound by removing a box from your chain is naïve and overly simplistic.

marcosb OP
 Do I need a preamp?

If!!! you love the sound of your Mytek and have enough volume from it, why color it, reduce the transparency/dynamics with a preamp?
Cheers George

Integrated DAC direct to amp is superior, except when it isn't. 

I haven’t experienced the static issue.  Thx for the heads up. 

My biggest issue with the Mytek was it would respond to a static discharge by going full volume.

But I liked using it directly compared to some, not to others.

The Mytek Brooklyn was more transparent than run through a Parasound P7. Slightly so.

With my new Luxman set up, I can't tell a difference and prefer the convenience of the integrated's source selection.

So absolutely required, no.  Maybe a safety issue though! ;-)