If you like the feel of the neck, don't just upgrade because it's a Korean made one. Upgrade if you know what the Japanese made Wizards feel like, and prefer it to the one you have.
With regards to the trem, save some money and buy a Gotoh licensed Floyd Rose. They are a fantastic trem, come with locking studs that you can install after pulling the old
trem studs and anchors out, and have the best trem arm holder design out there. You'll save a bit of cash to doing so.
Oh when installing the trem, whether you go with the Gotoh, or Edge, you will most probably have to do a little hand sanding around the edges of the cavity to fit the trem. It's not hard work though, anyone can do it. A dremmel can make it easier, but don't worry if you don't have one.
When installing new studs and anchors you'll have to drill the hole a little bigger too, shouldn't be too hard if you have some basic woodworking skills though.