Help me tune my Theta Gen Va DAC

Any word of advice is welcomed. I'm a newbee when it comes to tuning. One thing I was planning to do is to replace all caps on the power supply board with Black Gates. The PS board looks like this:

http://www.audioshow.com.pl/Zdjecia/audio/Theta%20Gen%20Va%20ps%20board.jpg

Do you think that it makes any sense at all ?

Do you think that I should use the same value caps ? And what type should I use (there are several different BGs) ?