does your Bose have m-ch analog ins? Even if it did, I highly doubt you will gain any improvement with lossless thru a Bose system.

if it only has SPDIF/optical, no mch analogs, then the 35 version is all you need. you will enjoy legacy dolby and core dts tracks. you will not enjoy mch uncompressed pcm track, but 2.0 pcm via optical. panny is good because it can translate pcm into dolby/dts, so you will always have some sort of surround.