Have decided to tidy up wiring on boat. Currently everything going to a bus bar that is attached behind the instrument panel.  Nothing wrong in that in itself, but I think in the event that something was to play up while out on the water, it's a bit awkward squeezing behind it while the boat rocking and rolling.

I though a switch panel with resettable fuses would be the way to go.

I've just browse and reckon a 6 switch panel is the go.

Question about the wiring.  Given that the new switch panel will have fuses, I'm thinking that all I would need to do would be to cut out the fuses already and rejoin the wires, then just run one wire from the bus bar to the new switch panel. (obviously making sure that I use the same fuse sizes that I already have).

Am I on the right track? any recommendation about the  brand and price of panel. the prices I've seen hugely on prices. It needs to be waterproof rather than splash proof.

While circuit breakers sound nice as in you can just reset them, fuses are more reliable, in particular the spade type. keep a small ziplok bag of spare fuses on the boat.
I have found the round glass ones that are spring loaded to be unreliable, as in if I come off a wave with a big thump, they break contact momentarily.
Tinned wiring is a must.
Never use the hull(if alloy) for an earth return.

As for the switch panel, the toggle type switches with the rubber boot over them are the most water proof and reliable. Not the little rocker types.

bare brass busbars will eventually corrode as well, used tinned (silver) ones.