Newbie Q about PCIe (and other slots) in P5Q range

[Jim]

I'm looking at buying an Asus P5Q motherboard of some kind (still unsure
which one yet) but i'm a little confused by all this stuff.

1 x PCI Express 2.0 x16 slot at max. x16 link (blue)
1 x PCI Express 2.0 x16 slot at max. x8 link (white)
2 x PCI Express x16 slot at max. x4 link (black)
1 x PCIe x1
2 x PCI

Now i understand PCI so my current Hauppauge TD-500 tv card will fit in
these fine, I also understand (i think) "1 x PCI Express 2.0 x16 slot at
max. x16 link (blue)" which if i'm right will run at 16 times faster then a
x1 slot and these are used for video cards as a rule, I'm not into games so
i won't be using this linking of 2 video cards or anything like that but my
question is will all the other slots be useless? I know x1 will take modems
another tv card etc but what about all these other slots that take more
video cards, I mean by looking at Asus website it seems the "P5Q Premium"
will take 4 of them.

My basis Q is if i just have 1 video card running in the x16 slot will i be
able to make use of the other slots for more normal stuff not more video
cards as this would be overkill for me, sorry for my ramblings but hopefully
you understand the point i'm trying to make.

Thanks for taking the time to read my post