Out of the clubs you listed, I can only speak on the TA7's as that is what I currently play. I bought my set in 2002 new and have yet to find a set of new irons that I like better, or at least not to the extent I want to drop $600 to $1000 on. The Taylormade RAC LT, which came out about the same time as the TA7, are very similar in feel and performance, at least in my opinion. I'm a 14 handicap and have tried blade and muscle back Mizunos, which when hit solidly definantly have a better feel. However, I don't have a lot of time to practice and my consitancy really suffered, so both times I went back to the TA7's.(thank goodness I didn't sell them)
I've seen TA7's on ebay for $150 or less, so I don't think you can go wrong. I'm actually thinking of finding a set of TA7 Tours to try, as these would be a slight move toward more advanced irons with less offset (baby steps!), but I haven't found a set cheap enough yet just for a test run.
Good luck