S'funny, I cannot think of any upgrades that I want at the moment. Bigger, faster, flashier, many of us would probably go for that, but no specific upgrades that I can think of.
The delivery system however, that is another matter. Saw my ultimate when anchored in a quiet bay off the coast of Greece. A massive motor yacht (read medium sized ship) turned up and anchored a couple of hundred yards away. After a while a RIB appears from the stern - now that is my ultimate - naturally it would have to be big enough to take my 6.5
Coming back to reality, I think that Bedajim is on the right track with his launching cradle within a trailer.