Aftermarket seats yay or nay

I was wondering if it is a good idea or a bad idea installing aftermarket seats. I've been kicking idea around on aftermarket seats. Another words if I install these seats would be like "Oh he shouldn't have done that they don't match the rear seat" or would it be "Oh man those are sweet... looks good in the car"

My 67 cuda isn't factory looking at all. It has Weld Prostar wheels and 70 cuda stripe down the side. Interior has Auto gauges installed in the dash and pistol grip four speed shifter.

The stock seats are very uncomfortable to me. I have them adjusted where my feet can work the clutch and brake just fine. However I slide down towards the floor board and have to readjust myself with just normal driving. Thinking about adding "blocks" to the front of the seats to kick them back some. Don't know how that would look however.

Anyone got aftermarket seats?
Advice or ideas... thanks.