Hi,
Ok so the CXN V2 looks to be discontinued… but it does seem like a nice unit.
It uses the Wolfson DAC chips while Rose uses the ESS Pro chips in their units… with the exception of their flagship RD160 which uses an AKM dac chip. Some do not like the ESS sound and prefer the AKM…
So which DAC chip you prefer is up to you… You may not even notice a difference.
The RS151 is a good unit and would be a bit of an upgrade in some areas.
You may also want to consider the RS451 and save some money. The ESS Pro chip in the RS451 is a different model, but not sure if you could hear a difference between the RS451 and the RS151.
The upside to the 451 is better BT options over the 151 which uses an external dongle for both wifi and bt which limits you to bt 4.2. (Not sure if that is something you’re interested in. )
The upside is that there’s a headphone jack which to the best of my knowledge is a first for Rose.
Your call.