Should i go ahead and by Welcome To My World first, then get Yip/Jump Music?

?
I'll eventually get both...
Thanks for the help.
I would for sure reccomend getting Yip Jump Music! and The What of Whom and More Songs of Pain first. It seems like all the first albums, especially those, play like greatest hits records and are just packed with one great song after another, as well as a bunch of cool artsy stuff, sound bites and other bits.