I agree! I like that these bands I dig are multi-generational and still have an impact on my kids. I know it's different for them than me (as far as the meanings of the songs), but I like that they really enjoy them.
As to your question, Journey was an epic band, IMO. I love most everything through Escape... However, I dunno if they are the same without Steve Perry singing.... I wouldn't go so far as to say its like Queen without Freddie or Queensryche without Jeff, but Perry really was the part of Journey that I liked. However, if you aren't all that familiar with them, I'd go.... the guy they have to replace Perry does a pretty outstanding job of sounding like him, and I think you'd enjoy it. Drag out Stone In Love, Feelin' That Way/Anytime, and Dont Stop Believin' (yes, maybe cliche now, but it was pretty outstanding) and get in the mood....