I'm interested in experiences with the new yard vacs on the market. This are lawn mower look-alikes in the $400 range. SEARS and Home Depot offer models that have 8:1 reduction; 2+ bushel collection bags, and 1.5" chippers with 4.5HP motors. I need to clean a ton of leaves on 3/4 of an acre. I paid 2 people $400 over 2.5 days to clean up with rakes last year.