Soldato
TBH you can get cracking tone from a 5w amp. Depending on the room, sometimes having a huge amp/stack can work against you, especially if you're trying to push the amp hard. One of the best tricks in smaller rooms is to have the guitar amp as quiet as you can possibly get away with. This way the energy from the amp/speakers isn't lighting the room up and muddying the tone. You get a much more focused sound as a result.
As for the HD upgrade - that little lot was north of £10k
I've got a pretty decent tone from it tbh. I'm just going to use it to give me options.
It has a pass through too so I could di and record the amp at the same time.