A brace? A little, but in order to really improve, well the more ya spend the better you are.
The suspension list goes on and on and on. A strut bar is usually step one for most, but a lot of people just skip it and do sways, end links... the bigger more important nick knacks to really feel the difference.
This post is sure to get the attention of our suspension gurus, so keep posted
Look at the design and how the engine is mounted in the subarus. A strut from what I have read, and talked to people personally, they noticed little to know difference with one. Start with sway bars if you want a stiffer, better handling car.