you will find that this is a 303 vs. 970 type of debate that we engage in on friendly terms here in the Ark Valley.
I have lived in both ends of the valley and love both towns in reality. For me and my wife we chose to settle in Salida because we love the downtown scene in Salida (walkable, enough good restaurants and the like to keep you happy at least by small town standards), closer to Monarch Pass for skiing access and general "feel" of the town.
All of that being said BV is closer to the Numbers and creeking options and there is a ton of new energy up there. Check out http://www.southmainco.com/
if you are not already aware of this super progressive development in BV.
Housing can be challenging in both towns as can work. But plenty of people give it go because in reality this valley is such a great place to live. Both places really are noticeably busier in the summer with Salida probably having a little more going on in the off-season with live music and the like. Maybe RDNEK or someone will chime in with some better BV knowledge.