Your going to find all kinds of opinions with an open ended question like that. Try, I am looking for PLA filament in the 20-30$/kg price range, where can I get the best quality for the $ ?. Still a bit open, but you narrowed the responses by providing a budget. I made the mistake of buying cheap thinking that i am new and bound to screw up so i dont want to spend.... but a better quality filament will eliminate that variable and with 3d printing, eliminating variables will get you better prints...
Good Luck!
Mark