DysonIsOverrated

Technically, the Rainbow vacuum was the first to not lose suction.  It uses a more primitive dual cyclone design with water as a pre-filter.   If the Rainbow didn't have such a ridiculously high price and clumsy power nozzle, it would be a pretty good vacuum.  I don't know why they require you to hold a button down to keep the power nozzle operating.  One would think that they would use a simple 2-way switch.  All that on/off cycling can't possibly be good for the power nozzle motor.   The Rainbow uses an innovative brushless motor.  It would be a pretty good $800 vacuum with a better power nozzle. 

Dyson had better watch out.  The original patents have run out, and other companies are taking his good filtration system and running with it.    With no monopoly on "no loss of suction", other companies can easily earn market share with knock offs.  Dyson still doesn't know how to build a decent power nozzle for American carpeting.  Dyson's canisters haven't been the most reliable either.   LG is a real up and comer.  LG has a fairly good reputation for making high end laundry appliances.   I suspect they will make good products.  If I'm not mistaken LG is producing some of the Kenmore vacuums now.