Given the choice, I'd take the Interlagos over plain cloth/leather any day of the week - but I don't know if I had such a nice set like yours that I'd be willing to bother with the time/expense to change them. If they were knackered, and you'd paid knackered money for them, I'd see the point.
I think they look nice as they are, but if you're going to do anything, replace the centre with Interlagos and leave the .:R logo as it is.
Or, option 2.7.3 - have GTI stitched onto the top of the backrest of the new centres???