Hi Smithy - to say any mic will do is perhaps putting words into my mouth, you get what you pay for and all that..
I have a Samson usb mic, about sixty quid, and it gave me poor results (user error perhaps), so bought the zoom, which I can't praise enough, few others are now looking at getting one...
but for a cheap option to get you on the ladder this ebay item is the one I have; 150270758720
Check out Crazydaisydoo He often posts on this site but he very kindly posted two very informative videos on youtube.
I personally use a shure 607 mic into a behringer 602 mixer via the line in then recorded with Cubase.
Thanks for that Taz, been following Crazy for a while, b#^%dy impressive stuff........ plenty to feed on there, as is the quality of Smiffy's recording