Good to hear you're keeping it. Don't worry about the timing belt, it's a chain, and so far they don't seem to have the issues they had in the MK6.
If you're thinking about a Superb for the added practicality, don't discount the Octavia vRS. Estate or hatch, it's 90-95% of what your GTI offers but with a cavernous boot and slightly longer wheelbase.
The Superb is a very plush, really nice and refined. But even the 280hp 4wd one isn't going to offer any driving thrills IMO. It's a jet propelled sofa, not an engaging drivers car.
