If you're looking for a DI which doesn't mess with your sound and your source has plenty of level eg keys, e'drums, non-passive guitar p'up, then you you're looking in the right place. The PROAV2 has the same internals as the PRODI2, but you get the connectivity flexibility of the RCAs and 1/8" trs inputs, for those times when you need them. And once again, if you're looking for 2 DI channels, you have the convenience of them both being in one box - less stage clutter is always good. Also, the twin unit is at a very helpful discount over buying 2 single DI's. You can't go wrong.
I use this at church to interface our media laptop with our sound system. I like the flexibility in inputs: you can use either 1/4" TS cables, RCA cables, or an 1/8" stereo cable. Like all Radial boxes I've worked with, it's solid. Recommended.