To pre or not to pre

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.

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

+1

     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

+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.