So my car needs all new balljoints upper and lower! What I was wondering is it worth going aftermarket or is oem good enough? Also where is best to buy from?

 

For the lower BJ Honda still sells them and they tend to be cheaper than the aftermarket.
Upper control arm can be hit/miss from the aftermarket. Honda is the most expensive but are the best quality for stock replacement. Some have scored with OEM-esque arms from Dorman, some have purchased pure junk from Mevotech. I've been eyeballing the Beck/Arnley as they tend to have pretty decent replacement components for the price/quality. But again some places are just reboxers.

 

Moog makes good quality stuff as well.