I had the front springs changed by a local mechanic, as he had the kit to do it, and I changed the rear shock myself, very straightforward.
I am 105Kgs and once two up with luggage needed more adjustment than the stock shock would give, even with a new spring. Also whne out of the bike you realise how cheap and nasty the stock one is!
Not regretted my Hyperpro upgrade at all, love the way the bike rides now.