Ports are the shit as of opening up the engine getting the most out of it. But for $35.00 why the hell not advance the timing!? Just like Oilsmoke said, its all of the smaller mods added up that build the real screamer.
It would be like saying, 'Well I have it ported now so I am just going to leave the factory exhaust because I have a port.' The way I look at it is- all of the smaller mods like- timing advance, reeds, exhaust, etc- is prep for porting. They all help in better performance in working with each other making the shee the ultimite screamer! Ok- I'll get off my soapbox now