Out of those sets, personally I would go for the C801. The slimline models will work on both US and EU pin tumbler locks and will be more suitable for the tighter keyways you find on some padlocks.
The other thing to look out for is all the picks in that set come with the full metal handles, although I've never tried the "slip on vinyl" handles on the PXS-14.
May I suggest a bit of a browse around the forum as well if you're still a bit unsure. Many people have asked this question before.