I have Procar Rally seats in my '69 chevelle. I went with the black velour covering. I love them, they're lightweight, comfortable, and were easy to install. Best of all they're inexpensive. I chose the velour covering because it would be cooler to sit on (no AC in my car), and you don't slide on it. These seats really hold you in the car.
The bolstering may be a bit overwhelming if you have a 'large build'. But my scrawny butt fits in them with no problem
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If you're building some high dollar SEMA car then they probably aren't fancy enough. But if you're like me and want the 'go', but don't have money for lots of 'show', they get the job done.