From my experiance, the fastest way to keep sending rounds downrange is to transition to another firearm. A brace of J-frames has been a popular option for quite some time now.
The Safariland speedloaders are the fastest way to reload a single revolver provided the shooter uses only Safailand speedloaders. If you have revolvers that are used as a primay that only use HKS speedloaders (.327, 7-shot L-frames, etc.) then I srongly recommend using ONLY HKS speedloaders. In the heat of competition (or worse), you will have to "push" pretty hard on a HKS to make it release the cartridges. If you get used to HKS, and train hard, you will be hard pressed to notice any difference in reload times between Safariland and HKS. Just watch an old-timer reload with HKS.
Personally, I prefer Safariland. However, I accept that they are much harder to come by than HKS and have purchased more than my fair share for my Pythons. I still need to get some more for my J-frames.
Speed strips are rather slow, but carry so nicely that I have more than my fair share of speed strips. I have discovered that speed strips do not last long after they go through a washer and dryer cycle.