I am in the neighbouring village of Tuzaguet, about 10 minutes drive west of St Laurent de Neste.
As mentioned by others, it depends on your needs. The villages bordering the Neste river are all very well served by roads and services such as Internet, but as you move further into the mountains, the roads get more difficult and Internet connection can get flaky.
In addition, living just a little back from the mountains, we don't often end up in the thick mist / fog which shrouds the mountains, which is a fairly regular occurrence in winter!! Also, bear in mind that being at the top of the valleys gives easier access to them all, as you can nip along the autoroute, but once in the valleys, getting to the others involves twisty mountain roads, some of which are closed for 4 - 6 months of the year by snow.
There aare good hiking route everywhere! In Tuzaguet, there is a local walking group that goes out every Monday afternoon. I can introduce you if interested.
Unless you really want the mountain life, I would recommend one of the small villages at the top of the valleys. I have always liked La Barthe de Neste as it is big enough to have shops etc, but still a small quiet village. Plus it is at the top of the road to St Lary Soulan and just outside the Barronies area - a wonderful walking area with tiny villages and little else!
Hope that helps