Well looked after mk1 TT’s are quite frankly Ace.
The 225 can suffer with coil pack issues but they’re piss easy to fit and cost £20odd. Don’t think about the DSG box on the 225 because sometimes the mechtronic thingy goes pop, but they can be changed easy and cost about £120 if you look around. The hardtops probably the one to go for if you intend to carry a bike (my mate carries his windsurfing kit inside his not problem with the seat flat) if not then the roadsters pretty damn fine car. Also if you look at a roadster get the one with the manual hood closure system not the auto one. Shocks on the front can wear because they’re front end heavy and speed bumps tend to take aim at the front wheels. Discs and pads you can get for £75 a side. Check the hood around both door/window junctions because they wear here. Other than that parts are cheap because EuroCarParts and if you fancy it VW/Audi mean all stuff is easily available. Also the haldex 4wheel drive will need checking out to make sure the oils been changed on service intervals. Also another thing, front radiators may need a flush or replacing (depending on age and condition) they sludge up if not serviced and cost £200, also the oil radiator under the front bumper may need checking for no other reason than why not.
But, but these are very good cars and a lot are second car family loved and looked after.
Also, if you look at the roadster you can get a bike on the back via a saris bones rack easy, they just fit in the seal behind the hood and under the rear bumper splitter.
Can’t honestly think why you wouldn’t think about a TT, plenty available for your budget and if looked after big mileage shouldn’t be an issue.