BTW if you have a T10 with an engineered 6A PD get a ship (Python/Conda etc) that can handle a 7A PD and engineer it. The T10 is getting a buff to class 7 PD.
What you should do, if you need to buy a new ship is check out the components you require, Get a ship that you can install them in, Engineer them and store them to be ready for use after the 3.0 goes live. For Example for the Chieftain, I am using one of my Condas, one of my Asps and got a Vulture j...
I need to do this too (to reach Admiral) and I read that Sothis/Ceos has good Fed missions for grinding. If you gave the cash 17 Draconis has donation missions Niu Hsiing has a planetary base that gives a lot of fed missions too I bet if you google the frontier forum you will get some more up to dat...