Straight out recommendation questions should usually be off-topic here. But some recommendations can be salvaged, by being converted into a "what features are important?" question, or even better "what does this specification mean?", and "how do I know what to look for?" questions.
A really good example is this question on superuser, which originally said:
MONSTER BEAT SOLO HD&SOLO HD WIRELESS
I want to buy a monsterbeat solo hd wireless,but i am worried about the sound quality when it's connected to bluetooth,can anybody tells me,is there big sound quality difference when it's connected to bluetooth,even when it's wired is there big sound quality difference between solo hd wireless and solo hd?Thank you very much.
For any stackexchange veteran, that's a painful question to read. But @allquixotic skilfully converted it into a quite useful discussion over the relative merits and quality of bluetooth audio vs 3.5mm wired audio:
3.5mm Analog Audio vs. Bluetooth Audio Quality
I want to buy a wireless (bluetooth) headset, but I am worried about the sound quality when it's connected to Bluetooth. All other things being equal (e.g. the quality of the headphones themselves is the same), is there a noticeable impact on sound quality when it's connected to Bluetooth, compared to an analog audio jack? What about between the a bluetooth headset and a wired headset when the bluetooth headset is wired (plugged into the jack)?
I am currently looking at the Monster Beats Solo HD vs. Solo HD Wireless headsets, but I am looking for knowledge about the pros and cons of bluetooth audio and analog audio in terms of quality.
The new version of the question retains the relevant parts of the original question, but moves the focus to the re-usable information that could be useful to other users trying to make the same kind of decisions.
Not all recommendation text can be salvaged in this way, for example, this question asks for recommendations for online sellers and brands of specific gear. While there could be some useful information in there (the one answer to the question does provide re-usable information), the question is too convoluted to bother, and it would be better to start from scratch and re-ask a cleaner question.