Never sick of questions. Can't go wrong with Crucial or Intel. Essentials doesn't come with Exchange. I don't think you need it, but sometimes you have to believe us. Awesome product.
EVERY tech advocated for RAID. Crazy to go without RAID. Better performance and much more reliability. Can't replace backups! Don't go software RAID. Go with Hardware. I do think SQL will run faster on SSDs.
SSDs are flash drives and have no moving parts. Hence the speed, quiet and MTTF. But, it is relatively new technology. Plus, if you go with 128, you will have to use 1TB regular drives for data.
As far as parts, go with the recommendations on here by Sandeep or what he says.
Sandeep will kill me, but given all the new stuff you are doing, have you thought of just getting a Dell Server T110 or above? Warranty and the industry standard, and you can't go wrong.
