With regard to RAMDrive.
It's usefulness today is rather limited. I was running RD on 1366 with few old software pieces (SSDs were working only in SATA2 mode). With 2011-3 switch I found there is nothing to be gained. Fast CPU + good SSD is enough. I'm not a cyborg to detect that 0.2371s difference. ;) Perhaps like CoolGTX said it'll help with large CAD projects - but only with software immediately creating backup on non-volatile medium. I've decided against 64GB of RAM before switch. With 32 I ran some tests early on and differences (1366+RD vs 2011-3+SSD) were in the margin of statistical error (3%) which makes whole hassle of running & populating RD every time pointless in the extreme.
To some extent I feel like 32GB is vast overkill at this moment in time, even if I attempt to run everything at once.