Groan - another post from an SLR newbie... apologies!

I'm looking at purchasing my first digi SLR camera for a round the world trip next summer with a budget of 300-400 (lens included). I have friend who uses a Nikon D60 and has achieved pleasing results. Likewise my future father in law has a Canon 400D and recommends it highly. I think the Canon is too much of a stretch financially and I'd like a few more features than the D60 provides. I like the look of the Sony Alpha a330 but I'm not sure about lens options for the Sony.

I realise I'm asking about a thousand questions here so I'll rephrase concisely... What's going to give me the most bang for my buck?