Originally I was planning on getting the 7cm, but I found a good deal on the 8 so I'll probably just go with that. Hopefully it won't be too laggy.
As far as wrapping the cast iron headers is concerned, I think you may be better off just ceramic coating them instead. Cast iron already retents heat pretty well as it is.
The difference between my auto spray and the jdm ic spray's auto setting is quite different. If you press the auto button of the jdm ic spray, it'll keep spraying until you press the button again. Although this is fine from a performance standpoint, it's not in a practical sense. Every time you put it on auto mode, you'll end up using A LOT of water unless you make sure that you turn it off again. With the auto spray I'm buying, you never have to press any buttons at all (unless you want to). The ic spray will only spray when it needs to (i.e. when ic temp is hot, when you're actually moving, etc.) I've seen the spec c tank around before... the problem with the container is it's almost $300. That's a ridiculous price for a tank, pump, and fittings, if you ask me.
As far as engine management is concerned, I really wanted to get an accessport, if only for the on-the-fly map switching feature. That feature is crucuial if you have a meth kit for obvious reasons... you don't want to be driving around under 5 psi if you run out of meth. However, the ap is not jdm ecu compatible.
Ecutek is another possibility, but I hate how they lock you out of your ecu and make it so that you can't use another form of em. Plus it's pricey, and I hear their map switching feature plain sucks.
I considered getting a utec, but I don't know anything about piggybacks so I didn't want to go that direction.
I ended up going open source. It's a lot cheaper than all the other forms of em. They don't currently have the ability to switch maps on the fly, but with the development of ramtune, real time tuning and on the fly map switching will be possible in a few months. I'm willing to wait, so it's no big deal for me. I think ideally, if you want every sing hp you can get out of your setup, you should get some sort of reflashing em (like open source) and a utec.
Plus you don't exactly live nearby so you should check to see what local tuners use. Whatever they use areound your parts is what you're probably going to be stuck with. The good thing about socal is I can pretty much choose any form of em and get a tune nearby (except with an xede, haha)