I have the Vanatoo Transparent Zeros and for the price I don't think you can do much better. The smaller Audioengine and Kanto powered speakers look nice but they really need a sub to help with the lower frequencies. The Vanatoo's really have an advantage with the passive bass radiators. Highly recommend.
Best Desktop Speakers under $500
Will be used mostly for listening to music/podcasts while I work. I will not be getting a sub right now since I'm in an apartment so that is something to keep in mind.
I enjoy nice aesthetics so if they look nice or come in a color other than black, that is a plus for me.