Agree with the comments above, but looks good. A little surprised at black hardware being $20 (making black hardware effectively $50 compared to $30 for chrome) more than chrome as it's normally roughly the same price to buy elsewhere, but I don't know the difference in cost to you, and it's still great to have the option. If you wanted my suggestion, I wouldn't have blinked at $10-15 difference. Price drop without the hardware is good I think, not extreme but a good saving for those who want to upgrade or use hardware they already own. Pickups don't drop much off the price, but I assume they don't cost you much, and I think most people will be happy just to get a small saving and not have the stock pups lying around if they plan to upgrade straight away. Can't comment on the gold hardware price as I've never been much interested in gold hardware and don't know what it would normally cost!
I definitely think having the options separated would be the ideal choice, but I think the single drop down would work. Would be good to have all the options (e.g. Black hardware, no pups, no scratchplate) available.
One thought I had - offering kits without hardware, do you want to provide undrilled kits or list the specs of the holes in the kits (post spacing, stud diameter etc)?