what are your plans w/ the car and how low do you want to go? coilovers will give you adjustability but be a waste on a DD and most likely be too stiff for the street. a good strut spring combo is what id recommend.
With springs, it all depends on the dampers you want to use, pick a strut and build around that. With coilovers there are some choices, you'd want to do your homework regarding springs rates and damper quality.
FourorTwo has a good point and it also depends on what part of Jersey your in. If you do any traveling into NYC, the pothole capital of america, I suggest swift springs (cheaper option). If you plan on participating in some form of motorsports I would go coilovers or a good strut spring combo. 08 sti front lip height awareness is key, the forester has a long nose that gets easier to scrape the lower you go.
I'm running the STi pinks with the stock struts (dealer installed them on the car before purchase). They do a decent job of getting some of the air out of the wheelwells - about the same as the Swifts I'm told. I do like the linear rate springs as to the Swift's rear variable rate. I'm also running a big RSB (Perrin) and rear subframe lockout bolts that really improve the response (Whiteline).
I'm pretty happy with the ride height as I hate to feel contained. I don't slow for dips, potholes, or speedbumps - I can climb medians and park all the way up on parking stops and chin over most curbs.
I like the look of a lower setup and suspect a lower center would help cornering - but if you are braking early to power out hard, it's not as big a deal, and the higher center of gravity tends to give me a more progressive feel as the back end rotates out.
While I have replacement wheels, and the tires are 225/55R17 - the diameter measures exactly the same as the stockers.