I haven't heard the Wiim, but I am enthralled with the Bluesound. why? It is good out of the box. Although I have never been sold on the internal dac, for someone new to streaming it would be okay as an introduction. Where it has really excelled for me is that it offers a budget friendly upgrade path which I have chosen without breaking the bank.
I used it for some time as a streamer only, but have added two things which I believe offers significant improvements. The power supply is almost universally agreed upon to be an improvement . I use the PD creative which is a great improvement. I have also installed a budget optical isolation system with a good power supply which in my opinion brings the entire chain up to high quality. I have used a Benchmark dac 3 which seems to excell in this environment. I ultimately decided on the Lab 12 Dac ! which I prefer over the Benchmark. From what I have found, this dac, unlike the Benchmark, can be improved with a re-clocker and I will install a Mutec eventually. Could I have started with a higher quality streamer initially? maybe, but I am satisfied and don't see any further upgrades to the streaming system. Dac maybe.

