Break barrel recommendations?

Although my primary airgun interest is PCPs, being involved in the $100 challenge and also fortunate enough to have an indoor 10m range (which doesn't suit the PCPs) has rekindled my interest in break barrels.  

I have a few, the most recent acquisition being an HW50 which I purchased only because the Norica Vertek I had before it had a barrel issue - as did all of Young's remaining stock of that model.  I could only load around 10-20% of pellets by hand, the rest I had to force in with a probe which in most cases damaged to pellet.  I can't be sure, but my thinking is that the barrel was machined the wrong way around with the choke at the breech end. I'll never know for sure, but it was a lovely light gun and I wouldn't be placing this post nor would I have purchased the HW50 if it hadn't had that issue.  

The Weihrauch is beautiful gun of course and accurate, but even the HW50 is a heavier than I'd like.

So I'm looking for recommendations for a lightweight springer or nitro model in .177 that will do around 600fps.  It must be a break barrel (I'm not interested in CO2 or multi-pump) and have a high quality barrel.  I'm not keen on Gamo, but if someone can convince me that they make a model that meets my requirements then I may have to relent.

A long shot I know, but if anyone has a Vertek with a normal barrel that they'd like to move on, then I'm definitely interested.