Any recommendations for possible speaker upgrade and/or subwoofer? I have a large Victorian conservatory where I want to set up a streaming system like this Denon package, and may need speakers with more oomf.
Depends what you'r looking for: Real excellent HiFi or good quality set with many digital options for a reasonable price. Bought the set including speakers, but use it with speakers i already had (which were as expensive as the set); i'm happy with the combination. Controll all options via HEOS-app on my iPad.
In the end, it's a matter of taste and the amount of money you're willing to spend