OG, I know you're a good player but standard 3 or 4 irons are not heavily used on the PGA tour currently. I think you'd enjoy a nice fairway wood in that spot. I'd encourage you to add a wood you like and a wedge but since I don't think you'll consider the wedge... drop the 3 and 4 irons or the 3 and 5 just keep the 4-6,7,8 etc I'm sure the effect on your scores will be negligible.
With an iron like the HoganFTX no idea which version you're referring to but not sure that it makes much difference the most likely biggest factor is going to be the shaft fitting. I don't know your swing profile but try and get a shaft that works well for you. That's actually going to be much more important than getting a good deal.