many buttons does a gaming mouse need? If you ask ROCCAT -- for today at least -- the answer is three. Evidently not happy with the current choice of tri-buttoned peripherals, it's launching a new "Lua" model at both Computex and E3. As well as the aforementioned triplet of clickable appendages, it houses a Pro Optic R2 sensor which will let you jack the DPI setting from 250 up to 2000 and back again on the hop, battlefield, or wherever you may be. The ambidextrous device launches internationally sometime in late July early August, with a $30 price-tag.