If you want to run SL at full detail I suggest a quite powerful machine. A 2 year old midrange gamer rig won't handle it. I built my machine for SL. I7 2600k @4.6 GHz, SSD, 12GB RAMand gtx 560ti and guess what... with draw distance at 192m it still struggles at about 30-45 fps at times.
There are several reasons for that. Everything in SL is streamed, content is mostly not made by professionals and therefor mostly unoptimized (texture sizes, vertex count etc) and other reasons. You have a degree, you will figure it out. ;-)