I wouldn't bother with the ram drive.
As you are tossing up between 16GB RAM extra and an SSD then, I also wouldn't bother with raid 0 on SSD's or M2's, as that increases your costs, unless you are doing something that requires insanely fast read/write speeds for disk I/o and manages to flood the buffers of a single SSD/M2. Most people are not.

If you are moving from HDD's only, then an SSD/M2 of pretty much any kind* will be like all your Christmas's have come at once. Even my 6 year old C300 (one of the early SSD's) performs better than a HDD.


*there are some caveats, some models perform better than others, but pretty much all the ones out there today will beat a mech HDD. If you don't want to do any research then best to stick with current Samsung models, they are generally better performers** and you wont go wrong with getting one.

**Yes there are benchmarks which show a other brand/models beating them, but not many (like 3?), and usually at higher cost.