I have my 800 Icon for almost 2 years and over 4k miles. Don't see the need to spend more money on anything new. It runs great. Looks good. Fun to ride and best of all, it is paid for. With that said, if I had all kinds of money to throw around...Maybe a Monster 1200. Don't think the 1100 would give me anything really significant over and above my 800.
I have added the usual stuff to my bike; Comp Werks exhaust, handlebars, bar-end mirrors, tail tidy and scrambler side bags.
Your money...whatever makes your happy!