I appreciate the input from both of you. It sounds like I may not have been too clear with how I represented the current state of the handling, so I'll try to address that.
The car corners and carves to my taste - very neutrally, very controllably. It's certainly possible for it to get out of hand, but I figure just replacing the shocks and struts with GR2s would be enough to take care of those instances within the tolerances of my actual driving skills.
But a lot of the roads around here have sudden drops where the ground has sunk or risen slightly, some of which I can't imagine being less than 6" change in level, and there have been plenty of times where I've scraped the mufflers as the back end dumped off the drop, and I swear there was one time I scraped the floor of the car when I went over a bump on a section of road that also drops off to the right about 1/3 of the way from the center line. So a lot of my goal with raising would simply be to keep the car that much further above the ground, and I'm asking about handling simply because I don't want to substantially worsen the handling the car already exhibits.
I recognize that the center of gravity is one of the keys to handling, but I have to imagine the H&Rs are stiffer than the stock springs, which should contribute positively, right? That was what I was trying to compare to the Outback suspension, which I would assume has very similar spring rates to the LGT, but IIRC would raise the car almost 2 inches.