Esoteric F-05 Integrated - any opinions?

My F-05 just arrived yesterday. At first hour of running, the sound quality was not better than my previous pre-amp/power-amp system, which cost only 1/3 of F05. I was worried my wife will not notice any upgrade.

After few hours of running, F-05 performed better and better. Even my wife is not sensitive at sound quality she still can feel improvement.

Originally, my target was Accuphase E-470, but the dealer I visited have no E-470 for demo. They introduced me F-05 and MBL C51.

Since I have no chance to audit E-470 and I read this review......

Thank you greginnh. I am very satisfied with F-05.

My F-05 have run 36 hours.  It is quite warm on the front top and has some smell out after continuously running of 24 hours.   Now there is no more strange smell.  

I am currently using two Oyaide gpx-r power cords for both PS Audio P5 and Esoteric F-05. I still have few more power cords / signal cables for experiment. 

One of the motivations for my upgrading to new amp is the using of XLR cables.  My previous amps accept only RCA cables.  I connected both RCA and XLR cables between DAC and F05 for comparement. By switching the input from RCA to XLR, the increasing of sound spaciousness is very noticable.  

The function of XLR REC out is also perfect for my using of headphone amp.   My DAC ( North Star Supremo DAC) delivers RCA and XLR signals simultaneously.  I used to connect XLR to the headphone amp and RCA to pre-amp.  Now I can use XLR cables for both speaker and headphone system.  It seems e-470 has only RCA for REC out? This adds one more benifit for my choosing of F-05.