Bob has really put down most of the basic ideas very well and succinctly. Great Job !!!
Another thought, is that the windlass, bow roller, rode and anchor should work together to allow self-launching, so that you don't have to go up on the bow, which a major reason to have a windlass, so you don't have to go up on the bow to retrieve the anchor in rough weather.
The exact combination of rode and anchor will probably depend on where you plan to cruise / fish / and/or anchor. The local C-Brats can advise you what works best with the bottom types where you're going, or pick a combinaation that will most anywhere, and a back-up anchor / alternate type as well.
Once you have an anchor and a windlass selected, you may be able to use your factory supplied anchor roller and get a self-launching system, but often folks have go to a pivoting anchor roller that drops the anchor center of gravity down when the rode is released, enabling the self-launch.
There are probably 40 or more windlass manufacturers world-wide, but I'd advise you to stick with one that has a reputation for good customer service and parts availability here in the U.S. Windlasses are generally reliable once you get them installed and working properly, but it's not at all uncommon to have problems that require repair and good customer service.
My solution to the potential windlass and anchor problems is to move up one size in windlass and anchor size, and to use a lot of chain, but that's my personal choice.
Look through the threads in the Library Forums on Anchoring. There's a wealth of information there... enough to write a book!
Good Luck!
Joe. :teeth :thup