I got some black in my boat, but I live in Iowa. It doesn't get as hot as other black upholstery (I side by side compared it to a new Malibu), but it still gets hot. If I lived in TX, I would not get it on my boat.
Did you get a quote for trade in on your X1. If TX is like IA, you won't get taxed on the trade in value. I got a pretty good trade in value when I bought. I would have needed to sell it privately for 5% more to offset the sales tax difference. I might have been able to get slightly more than the 5% difference, but it was nice to not have to worry about selling it too quickly and going w/o a boat until the new one arrived.