Okay, first of all hi. I would like to add my input on a couple of things here.
First, I love hero system. I play it with the character creation book, the combat book and gadgets and gear all 5th. That is all I have ever felt I needed. My group has a great time and we play in whatever setting we chose. The system is well designed and very flexible which we all appreciate. Yes it does take time to make characters and other things, but it is a fun time and once you get the hang of it, not quite that bad. Since the group has previous champions experience it might help as well.
Now lets talk about GURPS : GURPS used to be my game of choice years ago, but then 4th edition came out and I was like what?! Third edition was a well supported product with 200+ sourcebooks. What annoyed me about GURPS at the end was everything had to be detailed. (EX Social Stigma : Dead for zombies), They also put out a supers book which while written okay was not (IMO) the best superhero system ever devised.
Just a little blurb on my thoughts. Near as I can figure my group plays basic hero and have never had an issue or a problem with it,