sitigeltfel,
Unless you've got a disability where having an alternate means of input would help, I suggest you stick to good old tried & tested keyboard and mouse.
Spend the money you save on a better processor, more RAM, and perhaps a better monitor if you've only got an old cheap one.
Touchscreens are great for specialist UI's consisting of a collection of discrete, well defined idempotent functions (cf. iPhone, iPad etc.).... becomes messy very quickly once you try to bring it to general computing.
Last edited by mixture; 6th June 2011 at 16:33.