Looking to get a stihl chainsaw, weedwhacker, leaf blower. Looking at the stihl ms290 farm boss, ms310, 16-18 inch chain, 56-60 cc. What is 56 and 60 CC converted to HP? and which saw, chain length would be better for taking down medium to large trees and cutting them up? and should I get the quick chain ajuster? Looking at fs80 brushcutter (attatch metal blade to cut down small stumps, brush and trim around house, trees, along driveway- would this be good for doing this? And how much is 25.4 cc in HP? For the blower looking at BG65D and BG85D with gutter attatchment and vaccum attatchment. BG85D has cruise control for constant air sped, do I really need this? Will use for blowing off drivewway , sucking up leaves, blowing out gutters... Which model should I get?