Salam Amir,

I SC my 986 Boxster sometimes ago and I started regretting it from the moment I drove off the workshop. Basically the sweet car that I had before the SC was no more. Drivability, reliability, driving enjoyment and most importantly the sweet sound of the engine (Covered by SC whine noise) went out through the window. Worst of all, the engine blew up one month or so after the installation. It was a nightmare and I won't do that mistake again.
My advice to you, keep the car stock if you want maximum enjoyment. However if you still insist on moding your car, I recommend an engine swap because, I learned the hard way, the Boxster's engine is not designed to cope with forced induction .

I hope this helps