Hi aj
I own a new 1.9 tdi Stylance too but did test drive a 2.0 before deciding - and speaking as one who formerly drove a soft suspension car (Pug 406) , I'd say the Leon is fine. In fact, it's more than fine, it's great.
It's a tad firmer over rough ground than many but the Leon is so "pointy" (goes straight where you ask it to) that you won't worry about it because the sporty feel more than compensates. i.e. It's fun to drive.
On long motorway hauls it's very comfy and easy to drive and the cabin noise is nothing really unless you're used to "ultra quiet". The seats are firm(ish) but very supportive and by no means hard or uncomfortable on long drives.
If you find a car that makes you feel as fresh as a daisy after 3 hours then buy it but I don't believe they exist - at any price!!
The best thing I can say to reassure you is that I was worried about this aspect of the Leon until I took mine on its first long haul recently and i'd actually say it's a better seat to drive long distances than i'm used to as it's better for your back because it's more supportive and fully adjustable.
The best part of course is watching all the sheep in their Golf Tdi's (I say sheep because there are so many of them) look enviously at your car because they know it's basically the same as theirs - but looks far cooler and modern than theirs does
, costs less than theirs did , and that there aren't at least a dozen cars within a 5 mile radius that look exactly the same as the one they are looking at (which they envy
).
Go get a Leon!