Advice/Suggestions on my current modification path.
Hell yes you should, but that's assuming you are currently using the stockers, since you didn't specify. You will at least need NGK BPR8ES/BR8ES, but maybe even 9s. You'll have to see how well the ignition holds up. If you have an HKS DLI-2, then 8s will be fine with a good sized gap. If you didn't have that on the list, you might want to add it. Also, be sure to ask some of the recent 50-trim owners what they are using, because I've seen several 425-475whp 50-trims hitting the dynos lately, and their cars aren't losing spark at all - ask them for input...