Thanks for that. I'm assuming that the F4 is gonna be a good bit past my $600 budget. #cheapskate Also, I don't need it to sound the same as the 1990, (in fact, I'd like it to be a bit more forgiving), but I do want it to be as good overall. Are there going to be any review units for the F4 going out? I'd want to know if they're what I want before the Black sale ends.