Welcome aboard. These are great cars, and based on the cars you've listed it should fit well with what you are experienced in. As far as advice, read around these forums and focus on the stickies - tons of great info there on everything from break-in to modding, with a variety of informed opinions.
BTW - love the '88 RX-7, and I'm glad you still are able to hold on to it. I had an '88 Anniversary Edition (the all white beauty) and loved it. Great looking car with terrific handling and all the RWD turbo fun you could ask for. Drove it for years ... until the first kid came along - not much room for a baby seat in there.