Yea, deffinitely head off, if you've never taken it off, it will give you some good experience, and knowledge. Also you can see what kind of shape everything is in. While its all apart at the machine shop, have them give it a quick bead/sand blasting, it makes your head look brand new, and only takes a few seconds. Also have them check for warpage to see if it needs milling (or you can do it with a feeler gauge and a straight edge- i believe over .003" is in need of a milling as per nissan specs- but I do it if its over .0015"-just an old timers race-engine builders' rule). I'm not sure what you're meaning by: " a light port and polish", if you're gonna do it at all you might as well get a full out job (even a CNC p&p is less than $200 on a small 4cyl head). you can also deburr the chamber, deffinitely reseat the valves. I'd also look into some titanium retainers (some valves come with them), if you're planning on some real HP in the future, or a high revving life (any kind of racing, or just fucking around) they just add in the security of not having to take apart the whole engine again.

PS: You said you want less compression for more boost, but if it needs a milling and you don't get it fixed, it will warp more, or just keep blowing headgaskets. Just have them check to see if you need it, or do like i explained.