3D printers are, I do believe, on-topic for Hardware Recommendations (I moderate that site, so one might hope I'd know that).
In terms of recommendations in general, I recommend not even trying to get them into your scope yet. As a site that's just been set up, and was not set up specifically for recommendation questions, getting the balance of them right ...
I agree. Whilst I know that other people's opinions do and will differ, myself, I feel that this is on-topic. After all it is not an open-ended recommendation, but rather "is this suitable?" Personally, I can't see what is wrong with it and we have quite a few of questions like it, that haven't been closed.
TBH, this particular question has ...
I like the idea of incorporating product reviews into the 3dprinting StackExchange
It fits the Q&A model of Stack Exchange
Product pre-purchase questions are probably the number 1 question every new user wants to ask and needs to know (as Ryan noted). We should attempt to find a way to help provide that answer.
It provides a bridge to further ...
I think that hardware recommendations are ok, but in a limited and specific scope:
Can you recommend a cheap printer with a heated bed that's at least 8"*8"*8".
Which is better? Printer X or printer Y?
What hotend can I use to print at 300+C?
What are the advantages of borosilicate glass over picture frame glass?