I have the e-series Rainbow. Let me tell you, it was a heck of an argument to get me to agree to pay $2000 for a vacuum. Ultimately, it was the baby on the way and allergies that were won over by the air filtration feature. At the time of purchase (which by the way was over $3000 with financing), the Rainbow dealer made a "deal" with my husband that if he showed it a certain # of times and then sold 1 then they pay for the vacuum (rolling eyes) Right! They had him show it over and over for weeks at the very few peoples houses that the sales exhausted area hadn't seen it. Then before his very last...