you also need to decide on what cam grind to get, whether you want something streetable or you go for something bigger, which will then need supporting mods, so if you decide to port the head then you have to match your extractors, and say you choose a big cam with power in the top end then you should get extractors to suit this.
there are many variables take a look at my thread about my 5k and you will see alot of the problems i have had, although it is a bit different to your setup. And even after putting it all together I am still losing compression in cylinder 1 and it is out of my capabilities to fix, so will have to go to a workshop to diagnose what is going wrong.
So what I am trying to say is, get someone to do it all properly for you just once, instead of f@$king around, I am up to my 4th headgasket and the engine hasn't ran for more than say 2 days.