I'm not sure I understand the first question but you can buy different kits, though often times it makes the most sense to buy ram with the same specs to eliminate potential sources of hassle when troubleshooting.
That was sort of where I was going with it. The RAM I have now was a triple channel kit. Wondering if it's alright to buy say... two dual channel kits to hit 16GB rather than having to go for a quad channel kit (mostly because none of the quad channels have free shipping and so two dual channels come in about 10-15 cheaper).
Other part of the question was cost/benefit of doing an upgrade on RAM if I have 6GB currently.
They are both very good drives, I prefer the M4 since its relatively well tested by the community at this point but Intel drives have awesome warranties. Flip a coin.
Probably the Crucial then since I can get it either in Futureshop or online for cheaper than the Intels.
Honestly unless you really want to play back BR on your PC I would skip an optical drive altogether. You can do OS installs from USB media and its significantly faster. Bluray playback on PC is a fucking mess right now due to the licensing and DRM issues. Hard drives are cheap enough again that backing up to BR media doesn't really make much sense either. I tried to do the whole HTPC with BR drive thing and ended up with an HTPC for local media and a PS3 to play back BR discs.
I actually have wanted to be able to play BD on my PC, the PS3 is in an entirely separate room and there's times where it's inconvenient to use vs having playback available in the PC room. I might just go for a regular player instead. I don't even write to DVD most of the time, so really having a writer is overkill.
Thanks for the answers! Also, is Windows8 really as bad as they say it is? Might just get a fresh copy when getting the SSD, in case I have problems locating my Vista x64 disc. That or I'll have to drop 110 on Windows 7 again.