In the event that you need to reload in the heat of a gun battle, speed strips can get you killed. No point to using speed strips on any level. There are low profile speed loader pouches that won't make a bulge in your clothing and you can also carry a speed loader or two in your windbreaker pocket.
My advice is to use speed loaders (I prefer Safariland) and practice, practice, practice with them until you can reload in 5 seconds with your eyes shut every time. You might want to watch Massid Ayoob's video where he demonstrates his speed loading technique.