I've done so much research I feel I should open a SIB shop myself! Like you, I live in London and it seems impossible to try out anything.
Anyway, after months of research I've realised that there's not a significant difference between eg a 2005 package and a new package, so I'd recommend stretching that little bit extra to a new boat. They don't seem to devalue like cars do.
Good luck mate!!
To steal ideas from one person is plagiarism; to steal from many is research.