That calculator still exaggerates in several ways.
For instance, it claims that an IDE drive needs 19W. Speaking of which, Mubs, didn't you mean SATA? The calculator says 10W each for those. I wouldn't be worried about startup current. It's typically 2A, so even without staggering, a dozen drives could never need more than 24A very briefly. At switch on the CPU and any graphics cards are drawing very little and any decent power supply can handle momentary loads anyway.
The estimates for DVD-RW (27W) and CD-RW (21W) drives are over the top by probably a factor of 2 with current examples. BTW, why do you need a separate CD drive?
The estimates for 140mm fans are so far out (9W each) I wonder if it's a bug? Quiet models use less than 2W and a typical 60cfm at 1500rpm is about 2.5W.
I wouldn't call your prospective motherboard "High End", the features are pretty mainstream.
Why do you need to add both a FW-400 and a FW-800 card?
Some links to reassure you:
PSU Wattage
PC Power Consumption: How Many Watts Do We Need?
Debunking Power Supply Myths
Deciphering the numbers on the label
Historically, most power supplies have been over-rated crap that led to companies like AMD recommending double the needed PSU rating. You can avoid all this simply by picking a unit with 80 PLUS certification - independent testing guarantees it will be able to deliver its rated power.
As an example, I have a 5-year old FSP
300W rated for
22A @12V. It weighs nearly 2kg. I also have a brand new iCute
500W that can only claim
18A @12V. It weighs 1.2kg. Think about that.
The FSP's fan is seizing up, so given its age, I replaced it with an Antec Neo Eco
400W. This is an 80 PLUS unit rated for
30A @12V. Tests show it can actually deliver 36A if necessary, which is
at least double that of the 500W PSU ...