It's Iowa State and Seton Hall right? Forgot about Purdue, K-State is one of the worst big 6 jobs.
I'd say Iowa State is a solid job, it can be tough, but I think it has potential and a lot of other worlds Iowa State has reach A- or better prestige.
Seton Hall is alright with St. John's being open it can be pretty good, I think its a bit tough imo than Iowa State, but it's not like it's K-State.
Purdue I guess depends on the teams around you. Look at the performance of Indiana, Notre Dame, and Indiana first see if you think you are better than them or at least within the same talent ability. Then look a bit further at schools like Kentucky, Ohio State, MSU, Wisconsin. You can still be good with Purdue if those teams are all tough I think it's just a lot harder.
I wouldn't touch K State with a 300 foot pole while wearing full body armor. granted unless you are a kstate fan.