I was gonna upgrade my squier slowly (new neck, then new body, making a whole new guitar) but that's too complicated, plus it would be missing a string

I think I'll ask for some money for my birthday (September 18th), then I'll ask for money for Christmas. After I get all that money, I think I'll buy an Ibanez RG7321 and upgrade the pickups.

Good plan?
7 strings are a great thing. I'd definatly try one out before you buy it just to make sure. And even then, buying a low end 7 string is always a good idea because you never know whether or not you really like something until you've had some serious time with it.

Ibanez is a good choice because they build great 7 strings, that model particularly takes well to pickup upgrades and if set up properly is a great guitar.
Major of 7 String Legion 7 > 6

Carvin DC747
Ibanez RG2228
Schecter Avenger Custom Shop
and my baby....
Gibson Explorer Studio