Scott, welcome. You send the chocolates to Amie; the shortening of your waiting period will be in direct proportion to the size of the box.
So far as speaker wire, this is a commodity item and "high quality" is a given, so you can buy on the basis of price, probably most conveniently at a local source such as Home Depot. No connectors are really necessary; the bare wire is fine, but you can use banana plugs if you want more convenience in connecting or disconnecting.
Unless you really want to build connecting cables(the tools can be a bit expensive), the convenient and cost-effective way is to buy them ready-made from some low-cost sources which have been discussed here, such as Monoprice, Triangle Cables and Parts Express. Again, there's little or no connection here between cost and quality; this is an area polluted with charlatans ripping-off the gullible.
The four subs that you list are all excellent, with 3 and 12 just a tiny bit ahead of 2 and 10. If you're not opposed to saving a little money here the very highly-regarded Mirage S12 on sale for a very good price
here should also be considered. More later, I suppose.
