--offtopic
OS' have their power control options that you can use to put your drives to sleep when they are unneeded (admittedly could use drive-specific timings, storage drive 2hrs gaming drive 30min). Having them shift gears or states constantly would wear them down faster than just having them spin in idle. In servers you never turn off the drives unless absolutely necessary, as terminal hiccups are more likely when trying to start a drive - usually the motor or bearings just won't start spinning anymore. One also has to remember that the HDD discs are but the core part of a complex orchestra of heads and plates - they need to spin at a constant speed for the heads to be able to do their job. Every change in speed would mean heads would get nothing but read and write errors until speed was constant and within head operating parameters again.
It's true that drives mostly spin in idle, but that's the way they work (best). Glad WD brought out the 5400 RPM drives for those who actually care about power consumption more than a 0.8 ms advantage. And it's not like the numbers are completely unacceptable compared to the draw of other system components.
And you can't really compare optical drives to HDDs. Optical drives are made for a very specific purpose: random dedicated read tasks of external media and the odd dedicated write. HDDs on the other hand have to be ready to write or read at any given moment, having to constantly cater to the full range of applications that might be demanded of them. System (constant r&w), storage(more r less w, rare use), network(completely random use), RAID(max. use with random tasks), intensive (Photoshop dump, CAD, gaming)... drives have to function in all sorts of roles that have conflicting objectives with each other, so all they can do is look their best and leave it up to the end user to decide when they need to be around. Most important of all, they
have to be there, available 24/7. An optical drive can just sit back and wait for you to put in a disc - ever timed yourself and a drive when you do that? It's not a two second start and an 8.9 ms seek time!
Different systems have different advantages and disadvantages. I'm pretty sure we'll never see a variable-speed HDD in our lifetime, as it would require insanely precise head control or long wait times between speed changes, which would stress out the disc motor. I'd say the
3-11 W consumption of a HDD is nothing to worry about, even if they do spend the odd hour or two doing nothing.
-- /offtopic
If you want low idle power, hybrid graphics is the best bet. In the mean time, however, I think the OP's table is a good clue to what you want. I don't like recommending Ati as I'd never buy one myself, but if power consumption is important to you...
AFAIK you can't turn off card slots in BIOS. You can switch IGP on and off, but I at least haven't seen a BIOS where you could make it override a graphics adapter.