Personally, I prefer the turbo plugs. To me, they keep better tune and give better performance.
You can try switching to a normal plug, but I think you probably have other issues with the engine. Possibly an air leak, wrong plug for fuel & atmosphere you're running in, or simply not tuned right. Turbo plugs do have a slightly narrower "sweet spot", but not so much as to make it difficult to tune.
Edit: Just noticed you're form DC. Get one of the experienced local guys (Eric Jones, Nigel, Jason Miller, Arvin, etc) to look at your engine. If they can't get it tuned, it never will.