Hi there OP. That price sounds great, I paid only a bit under that for mine as ex-demo in 2015 (albeit mine is on 19s). I do a lot of holidays in mine although in the UK, but I find my GTI excellent at everything, long distance motorway cruising at which it's very economical and when you get on a more interesting road, it's great fun too! Obviously as someone else noted, it is great for a hot hatch so is unlikely to be as comfortable as a less performance orientated car.
I also love the manual gearbox and that's not because I'm anti-autos as I've had plenty, it's a good feel and is easily upgraded. Mine has a few mods including a short shift, mostly Audi parts so oem but I love the more precise feel. You can also do some mods to the clutch, the assistor spring robs some of the feel and is fairly easily removed but beware, once off is unlikely to be refitted! Another cheap easy mod is a clutch pedal stop which just reduces the amount of un-necessary pedal travel. It's just nice to be able to customise at minimal cost and easy to return to stock should you need to.
As to the car that you are looking at, black looks great but shows up swirls so needs plenty of sympathetic attention to keep it looking its best. But that's down to personal preference.
The GTI is a great car and copes with all situations making it the perfect daily driver. Plus 3 door cars are no longer available and to my eye look the best so sort your finance out and get it on your drive!