I've heard mixed reviews on plugs. Mostly positive ..... continue riding throughout the life of the tire. Keep in mind too, we don't ride scoots at high speed, nor rip through canyons alike sport bikes. Therefore, I'd say plugging your tire should be ok. Now if it were near the side wall of the tire, I would replace it.
@Chris - I've read many topics on the subject within this forum. I had done some searching over the web for myself and the tires I may switch to are the Pirelli Diablo's, which have been discussed as a choice tire. Otherwise, you can stay with the OEM brand, or go with another brand.
For myself, the OEM tires are just fine and plan to go the distance with them. I don't plan to ride in the rain, if I can avoid it.