[looking for parts brands for my 2014 impreza]

I have recentley bought a 2014 impreza so that my 1985 BRAT can get some much needed love. Good idea right? Any way, hoping to the some of you other Subaru guys could give me a few ideas for suspension part. Thinking coil overs. The goal is to be able to drive on the mountain roads around where i live without bumping  the whole time. Some kind of rally style or something. keep in mind im not talking about a lift kit. 

[What Top 3 Engines Would be Best to Use?]

Small VW diesel engines work realy well. I have a BRAT and I am looking to put one in that when its moter dies... if it ever dose... alot of them are FWD and can be 4WD if you want to go that route.