Just out of curiosity Andrew, what kind of costs have you been quoted for the new Turbo and Injectors, etc? Interested in doing those upgrades as well, I've got the same (almost identical) Mods to you at the moment, so I'm pretty keen to know what I'd be up for.
In relation to the SplitFire coil packs, I'd highly recommend the upgrade, whether your existing packs are good or not, if you've got the cash to spare, get the new packs, you won't regret it. The existing stock coilpacks will most definitely shit themselves at some stage.