I used to chop & change cars like crazy, and have been through all the usual RWD, FWD, 4WD, Coupe's, Convertibles blah blah - so I can potentially bore for Britain on this one!
TBH, from what you've said, I'd recommend the Golf GTI. IMO and experience, the 3 door looks nicer, but 5 door is easier if you're going to put a bike inside the car - oh, and the suspension is a bit more UK road surface friendly than the Audi and BMW's on runflat tyres.
As I don't like to carry my bike on the outside of my car, I recently bought a Skoda Octavia VRS estate - nearly got a Golf GTI, but am so glad I didn't, as I saved enough money to get a new Santa Cruz! I'm very pleased with the VRS - I love the understated look, and it's bonkers fast If you're spending your own money and go in and haggle hard, you'll get a top spec and plenty of change from your 30K. My VRS has full leather and all the gizmos, and TBH, apart from the badge on the steering wheel, you could be sitting in a Golf GTI. The seats, instruments, wiper stalks, A/C, satnav etc are the same as a Golf MK6 (I keep recognising Golf GTI parts:))
If you do end up going for a VAG car and are planning to keep it longer than the warranty, I wouldn't bother with the DSG box, go for manual. A pal has had an absolute nightmare with the DSG on his Audi.