If it were me Mike I would go with the big horn. Sound and leather may be nice, but I would struggle justifying the extra $25/month, $300/year or $1500 over a 60 month loan for the improved sound and leather.
You may stain the cloth seats, but hell, you can throw seat covers on for less than the increase in payment. I would rather save on the payment and put it towards tires down the road when they need replaced. Additionally, from an appearance standpoint, I have always liked the chrome bumpers over the painted fascias but as epe pointed out it means having to stay on top of the cleaning especially with all the salt on the roads in winter. Then again, how many people keep their paint clean but the frame is rusted to hell underneath?!?!?!
So after rambling, I would go for the big horn to take advantage of a cheaper payment.