You have lots of options without changing your panel. For instance, you could tuck a $2,000 Freeflight Rangr behind the panel and be done with no new position source or transponder needed. L3 sells a similar box as well.
An IFR navigator makes sense as a GPS source if you are already going to have one for IFR use, and of course the Dynon GPS makes sense if you already have SkyView.
Remember, there are tens of thousands of certified planes that need ADS-B out so there are a lot of companies making products to make these systems ADS-B out compliant without needing a $10K IFR navigator or a Dynon SkyView (sadly).
Of course, we think the SkyView solution would be the best
