PS Audio Perfect Wave DAC upgrade to DSD?


PS Audio DAC users - I currently have a Perfect Wave DAC with Bridge II, and it seems to me that the next best upgrade to my system is to convert it to a DSD.  I am a neophyte audiophile on a budget, this purchase will be the only major upgrade affordable in the next 6-12 months, what can I expect in terms of SQ improvement?  

Rest of system is viewable on audiogon systems; the short version is Thiel CS 2.3s, BAT VK-55, decent power supply cables interconnects etc.  Weakest part of the sound to my ears is the high frequencies, sibilance and smear in particular.  Responses in prior posts have pointed out the speakers as a weak link, and that is another potential/next upgrade.  Room is fairly well treated but still being optimized.
128x128thosb
@thosb -- Thanks for the reply!

I’ve been in a situation where auditioning speakers required a 4-hour car trip. It’s tough. After buying, I found that what had impressed me were the acoustics of the listening room, not only the speakers. So my journey into room acoustics began....

I will go out on a limb by making a general recommendation with very little knowledge of your tastes. If you can’t audition, and if you like acoustic music mainly, something in the British monitor tradition might be a great choice -- one of the Harbeth, Spendor, Stirling, or Graham models, for example. They are known for natural timbre and smooth frequency response.

I’ll close with the view of an old audiophile. It is interesting to me to participate in different fora. On AV Nirvana, DSP is king. Here, people put a lot of stock in cable swapping. On the Steve Hoffman forum, it’s LPs and midpriced equipment. And so on. After 55 years of doing this, it seems to me that changing cables is a thing to consider after everything else is right. It can sink a lot of money for results that are much harder to hear than fixing fundamentals -- which I consider to be speakers and room acoustics. It is more difficult to do the fundamentals -- the items are bulky and heavy -- but the improvements to be found are incontrovertible.

Whatever you do, I wish you a lot of pleasure doing it!
When I was shopping for my first set of speakers, which turned out to be the Thiels, I did listen to Harbeth and Dynaudia Special 40s, and they just didn’t have the jump factor or immersive qualities I have heard from bigger speakers.  I was starting from a pair of borrowed Maggies, perhaps it was this reference point?  Re music tastes, yes I do listen to acoustic music more than others but do like to rock out from time to time.  I guess I will earn some audiophile street cred by driving hours to listen to speakers.  
It affects us all:  Impressions of speakers change over time, as we listen to them more. What seemed impressive at first can become irritating after six months' listening. I have no magic bullet for dealing with that (but I'm pretty sure the answer isn't swapping cables).

I have found that eliminating slap echo and taming first reflections tends to reduce treble irritation, though it reduces spaciousness at the same time. I've concluded that the spaciousness lost, though pleasant, probably isn't found on the recording, but rather generated by the speaker in the room.