Actually I use virtual machines for 24 hours a day it means as long as I am using mac I will use WIN at the same time since I am a programmer.
A lots of guys here suggested me to go with 4g then for ssd.
So I think I may go with that but any good rams corsair or hitache?
I've been very happy with RAM I've bought from OWC.
On the SSD side, I would avoid Crucial. The support/communication from the company is not very good right now. Track the Crucial SSD forums if you are considering them for SSD.
Here's another "it depends" answers. If your Windows VM needs a lot of RAM, then go for the 8gb first. Generally, I keep my VM's pretty lean, around 512-768mb ram. But then, I'm doing limited things with most of them. OTOH, the VM I run my Netbackup console in has a higher requirement for RAM, so that bugger has 3gb allocated.
Again, it's all about avoiding going to the HDD to being with. So first allocate sufficient RAM to spend most of your time off the HDD and then optimize HDD performance.
On the SSD side, I sprung for 256gb for my MBP as I have 50+gb tied up in one VM alone, so my VM disks are chewing though a lot of space. For the most part, I would say to go as large as you can so you don't have to truck around an external HDD.
If using an external HDD is okay for your situation, then running VM's off FW800 should be fine. Actually, even FW400 worked decently for most of my needs.
Just some more thoughts for your consideration.
