Re: Which books do I need?
Thanks for all of the replies - particulalry Lord Liaden - really comprehensive!
I am a little at a crossroads in that, for my gaming group, M&M will have a lot of appeal as its based on the d20 mechanic (which they are familiar with via D&D) and I'll certainly be looking into it further.
However, while it is going back a fair while, IMHO the "feel" of the original Champions ruleset was more appropriate for a superhero RPG than d20.
So, I guess I need to do a bit more digging in terms of how much that flavour is still present in the 5ER (and how much of it is just romantacised by time!) and how much M&M is different from D&D.
As the Hero System Sidekick is available for around UK£6 its not a huge investment to test the water with . . . as for M&M there is a free chapter on character creation available that I'll take a look at which at least will give me some basis to form an opinion on.
Thanks for your help.