Pre amp upgrade, currently using DAC V1

Currently I am using a DAC V1 with me 250dr

rightly or wrongly I am itching to try a better pre amp but don't want to lose the asynchronous USB the V1 has on it really as it works well with audirvana.

with that in mind I could use the fixed output on the V1 into a better pre amp. 

previously I have toyed with the idea of a 282 but right now, it's out of range. In future maybe.

that leaves me with perhaps either the 202 with a napsc and maybe a Hicap at some point soon after.

Or maybe something like a 272. My issue with the 272 is that I'm not sure how I could integrate audirvana with it, not 100% a fan of a USB to SPDIF converter if I'm honest. And also kind of defeats the point of having it if I'm not using its streaming function.

maybe another way of looking at is, is the pre amp in the 202 better or worse than the 272?

Does anyone know if the naim app that works with the 272 streams to it creating a big buffer to erriadicate any possibly drop outs? I think audirvana works in a similar way. 

Any advice much appreciated