Ah yes. I have both those sets of cables somewhere around here. Should work then - thanks Sergio.
EDIT: Went and found some decent 5.1 Altec Lansing speakers - great sound for less than half the price at a second-hand store. Hooked them up and they sound great so far - but now need to get a 5.1 split cable (centre / sub + front +) rear to have the lot working.
Still, better than using the thin-as-shit Mac sound through the inbuilt speakers.
Looks nice! Too bad it's Android-only but looks definitely nice. Like the color screen (too bad that won't work well in sunlight, which I like about the Pebble) and the 4 day battery life.
IPad mini ordered. Really should have waited for the second version but refurbs from Apple were £230 and I've agreed to sell my iPad 2 for £220 so all good.