Here's my experience with this. I bought some monitors a few years ago. They sounded great. They weren't expensive and I can't even find any reference that the brand ever existed, but they just quit working.
So, instead of buying new ones, and avoiding the lower end of things, I bought good studio headphones. They sound great and the mixes sound good through them, but through anything else it sounds horrible.
So, I've decided to buy new monitors. It came down to either KRK or JBL. After reading tons of reviews the JBL's seem to have the best positive reviews.
At $500USD for a pair for 8" woofers it seems like a good deal.
I would definitely hold out and buy a good quality pair instead of rushing into it and if at all possible , buy an extended warranty. Buy something cheap to have it right now just may leave you with nothing a few months down the road.