i got the 550's due to a pretty good deal... i think it was $125 shipped for the 4. not sure on management yet. i know there are quite a few programs out there. from what i hear, a guy in kc is really good with turboedit, so i might go that route. so far i have just the basics for low boost fun. my plans, of course, go beyond low boost fun. so far i have a t3, blox-style manifold, an ic from a starion, tial wastegate, apex'i dual chamber bov. i have an ls block already stripped, but i don't know if i really want to go that route or buy a stroked and sleeved b16 block for $1200. i'm sure i could get the ls block sleeved for way less than $1200, but alot of people have varying opinions on lsvtec.