You've answered your own question, it comes down to how much
Ball joints (super pro) will give you approx -1.75/-2 degrees
Top mounts up to about -3 degrees iirc
You could also change to TT control arms and ball joints and get approx -2.5 degrees
Definitely worth doing any of the above, top mounts probably more track focused or if you need clearance for wheels IMO
For fast road Superpro ball joints would be the most cost effective