I'm going to have to disagree on the server recommendation by James.

146GB is not enough to host the OS and Amazing Charts. We have people with 100GB+ of Imported Items on our backup plan. We have seen lots of cases where people did not have enough space for Windows Updates despite following the MS recommendation. I would also look into using solid state drives over hard drives. There's lots of data supporting the reliability of SSDs and not just from the manufacturer/vendor.