I'm not sure you read my first post, DON'T buy a PC based scope if you can manage it, you can get used scopes that will more than meet your needs for close to the price of a good PC based scope. 2 channels more if you can afford it, 20mhz is a good number for starting bandwidth, they come with software but again consider a stand alone scope. E-bay has MANY to chose from if you can find one for a decent price. Look around post a link to one or two that you think might be okay for you.