If it were me, (there are many more here that have more knowledge on these matters than I) I would go with the Hr-20. I got my R-15 and my HR-20 at the same time. My Hr-20 is still running great, and my R-15 completely died the other night. Replacement is on its way. The advanced tech department said that they have more problems with the r-15s than the HR20's (though this stands to reason if there are more r-15s on the market)The Bird said: