i have the 4x24 PC and use it quite often in the shop and in the field. everything from prepping stock and grinding down nicked chisels to scribing c-tops and cabinet scribe strips. with a 60 grit belt i can even rough shape different curved furniture parts. if you have the sander you will continue to find different uses for it with just about every project you do. personally i like the 4x24 size but for most it is too big. but in this case the price is too good to pass up. so i say go for it, you wont regret it.
S.M.Titmas.
"...I had field experience, a vocabulary and a criminal mind, I was a danger to myself and others."
-Anthony Bourdain