Updated system need your suggestions

Please add Vandersteen 1Cs to your speaker option

I would think the PSBs are a great match for your type of music--big, dynamic, full range. I routinely see 'em used for less than a grand, which would make it a no-brainer. (I haven't heard the Ospreys, so can't opine). As for an amp match, the PSBs would probably benefit from more power.

Both the Osprey and the PSB Stratus gold are great speakers and at their current used prices a good deal. Paradigm studio 40 or 60 may be good as well

The small room may be a problem though with both these speakers overloading the bass. Been through this and its not fun.

Consider a monitor and sub system so you can dial in the bass as needed. Definitive Technology Mythos STS SuperTower or other DT models with built in subs would be something to consider but could be too expensive.

One other advantage to think about is that with a sub you could go with a better sounding but lower power integrated amp.

The Golds are awesome but really need a big space. For your needs, I'd find a pair of Stratus Mini's and a PSB sub. The mini's sound every bit as good as the Golds and will give much better imaging and depth in a smallish room. The big sub can hide anywhere.

The Vandy 1c's will do well in a small room but you may want a sub. However good they sound, they don't like abuse.