Chances are the wheel can be fixed, y’know. Shimano hubs are generally pretty good for being able to strip and refit them, and the rim could probably be trued if necessary. IMHO it sounds like perhaps the wheel wasn’t built amazingly well, unless you’re hucking it – you should easily see a couple of years out of a wheel with minimal maintenance, and spokes shouldn’t be breaking willy nilly.
However, if you do fancy a change (and why not!), you could do a lot worse than a Pro 2 on something. XM719 should be good, as long as the wheel’s been built up properly. The weight difference of the 719 isn’t huge over the 717, but the extra strength – and width for the tyre – will help. And they do pop up on the classifieds fairly frequently, so if you got a black Pro 2/ xm719 combo you could probably get a matching one for the front at a later date if you want.
Doh – it’s probably pertinent to ask what kind of riding you’re doing…