To me the singles are way over priced compared to the Deluxe. Not because they are bad processors they are great I use them all the time. But because you get like 10 of them for $400 (I think $400 I paid $200 on sale) which was an amazing deal. For IK Stuff I think its best to wait for a sell because they are always offering great bang for your buck. I like the company they offer great deals for great stuff. Just saying I wouldn't buy the singles individually when buying 4 at once will get you what you want plus some if you want to pick and choose between them.