I don’t understand Steve’s comments (@audioengr), but I’ll throw in my 2cents. I think it’s important to distinguish between using the Oppo as just a "transport" (ie, a disc player that outputs a digital stream to the coax or optical output), vs using it as a transport plus DAC (ie, taking the analog output after the Oppo’s DAC has done its work). If you like the Oppo’s analog output (ie, the output from its DAC), you have no need to worry about any additional equipment. I have no doubt that the Oppo is a good transport; the DAC is probably fairly good too, although that is probably more open to debate.
Personally, I have a Cambridge CXU that I use as a transport, because I’m not very happy with its DAC; if you don’t like the Oppo’s analog output, you might want to do something similar. In that case, you could pick up a DAC you like (the price range is all over the place, but you should be able to find something decent for around $500 on the used market; there are also many new entries from China in the $200-300 range that sound like they should do a good job, but I have no experience with them.) – then you can output your Oppo’s digital stream to your external DAC, and see how you like it; my guess is that you’ll think it sounds pretty good.
This is where I don’t understand Steve’s comment; is he saying to use the Oppo’s analog output (ie, the output from the Oppo’s DAC), but improve its timing by adding a Synchro-Mesh reclocker? If so, I think you might be disappointed; my guess is that if you don’t like the Oppo’s analog output alone, you won’t like it that much better with a $699 reclocker added (I think that's about right for a new Syncho-Mesh unit). Alternatively, you could spend an equivalent amount (or less) on an external DAC, and probably get a noticeable improvement in SQ.
On the other hand, if Steve’s comment is intended to say that you should get an external DAC plus a reclocker, I would say that’s fine, but get the DAC first, and see if you like it before buying a reclocker. My (limited) understanding is that most people would not see as much improvement from reclocking the Oppo as they would from using it as a transport with another DAC. However, if you think your system (and/or ear) is good enough to tell the difference, then you can buy the reclocker from Steve or other reputable dealers and get a 30 day trial period so you can see for yourself. Happy listening!