You are right. I hope that my post earlier in this thread did not come across that way.
I always applaud people who are curious about trying new things. But you did ask whether it's a good idea to upsample your files ... I provided an answer
I suggest that you try it. I don't use Foobar, so I don't know if it upsamples files. Both HQPlayer and JRiver are available as trial versions. JRiver's trial expires in 14 days, HQPlayer's trial can be used indefinitely but it stops playback at 30 mins requiring a restart of HQP. HQP also has more resampling options than any other player, including options to resample to DSD. For these reasons, I recommend HQP as a more suitable tool for experimentation.
The reduction in SINAD and jitter is DAC dependent - some DAC's show more of a benefit, some show less - so I also recommend you purchase an E1DA and analyse single tones, multitones, and perform a J-test with REW. Analyse the frequency response and expand the graph to include ultrasonics because that is where the differences usually are. Try it with different sampling rates. You will find that the differences between sampling rates / choice of PCM vs. DSD will be in the ultrasonics, and extremely low in level. That is, unless you happen to own a really poor DAC. And of course, listen for yourself for any audible benefit (if any). The only way to convince yourself if ASR has been giving you the right advice or not is to try it and see.