Yep I had one of these.
You can fit Wrx/Sgt Struts but not sti struts iirc. I had wrx struts with sti springs but still really high off the ground. I would look for some lowering springs $400-$600 or adjustable coilovers if you dont mind spending 2k. I also put on the Sti sway bar which is a nice little upgrade.
@Gripless I think some come with rear sway bar, my 2008 2.0r came with one. wasn't very thick tho. prob 15mm.
The hatch with lowered suspension with some nice wheels do look sick as...
Another mod is the sti rear spoiler, its expensive for just a mod that looks cool but it does make it look way better.