I have my heart set on getting a denon receiver after Christmas with some money I will hopefully get. Anyway, I was wondering if it would be worth the money to step up to the 1803 rather than the 1603. The main reason I would do it is because the 1803 has 6.1 capabilities. I am not that interested in using 6.1 right now, but I am trying to keep an eye towards the future. So what do you think? Is the 1803 worth the extra money. I would particularly be interested in hearing from 1603 and 1803 owners, but not only owners. Thanks.