I suppose my question might have been too "newb" for this forum,
I did alot of leg work yesterday and found the answers-
1-PCI Express slots are backwards compatible (this includes versions prior to 2.0). So to acheive my raid storage needs I simply need to order a pci-x x8 card and throw it in my x16 slot, no adapter or special software necessary.
2-The max throughput of the best raid cards seems to top out at about 1.2gb/s even though the x8 interface allows for 2gb/s in each direction. This gives me enough room for 10 of my HDD's so it works regardless
. The acception would be cross raid cards which I haven't looked into given my limited slots.
So there's the answer for the less knowledgeable browsing this post, hope I helped.