For future refrence OP, pcie2 is backwards compatible with 1, so it will run at the pcie1 speed oppose to the faster 2.0 speed...
No, hamster, you don't want any pce1 cards, they are out dated, don't worry about the bottleneck, there will always be a bottleneck in everyones system, so don't worry about it, Like right now, im running w/ a pce1 slot and i have a pcie2 card, it doesn't matter, the performance difference from 1.0 to 2.0 won't be noticable...
and about that "full package thing"
You will be getting the same perfromance on both cards, so what does it matter?