Our company is really, really big on never telling salaries to even people within the company. Salaries change from route to route based on the number of legs and I think your reviews down the road can differ your pay based on your performance. I will say I make a considerable more amount of money in the 402 then most UPS feeder companies pay their 1900/Metro pilots.
As for the company I've had zero problems with management. They've always been really helpful, supportive, and will stand behind your PIC decision making as long as it's not something real "left field." MX is pretty good, they're old airplanes that have taken a beaten, so stuff brakes, most of the time it gets fixed. You just have to verifiy always, which you should do anyway, but it still can be a bit frustrating.
The UPS shuffle is going strong here in FSD but the dust should clear hear in a couple weeks, and hopefully we get our FAR routes (or one of them) back from those other guys.
If you're seriously interested I suggest just applying for a 402 position if it opens up. Granted I got lucky to upgrade when I did, not a common occurance, but I'm going from 402 to Metro with about 6 months on the line.