Don't listen to people about the Z's cost. A base model Z comes with all the major options (power everything) for $27k sticker. But, there is no backseat.
If you want a new car for under 30k, the Z or GTS are great options, depending on how badly you need four seats.
If you're looking used... a Supra TT would be awesome. The problem will be finding one that is stock, and you do NOT want one that someone else wrenched on and abused. A 3000GT is another good option.