Hi James.
Screwdrivers are a funny thing, I bought a cheap set that you could put new blades into and then just made myself new blades from blued pivot steel. If I need a a different size or shaped blade I can just make one with a screwdriver sharpening guide and an oilstone. Much better than the junk blades they come with, almost as soft as chocolate. Loupes are also a little tricky, try somwhere that sells them over the counter and try them out, its much better than gambling and buying something on-line that might not be suitable. Tweezers are also worth spending a bit more on, You will be suprised how much you rely on them, you will only truly understand this when you lose them one day and try to carry on without them 
Paul.
