I'd take a rudder-rocker anyday over a twist-grip. I absolutely despise twist grip sticks. The rudder rocker on my X45 setup works just fine when mapped to give me rudder trim, and I use my analog CH pedals for rudders.
Whoever says that rudders on a throttle is harder to be precise than twist grip on your primary control stick is on crack. I've seen guys try to survive a scissors with a twist grip... It's funny as heck seeing them spin out of control and then grab their wrist to massage out the pain after they auger or get shot down.
Buy a cheap twist-grip stick before dropping any real coin on them. You might like them... Lots of people seem to like them because the damned stick manufacturers seem to be putting twist grips on everything nowadays. But why not just get some real rudder pedals, which also gives you the option of adding in a wheel and having a decent car racing setup too? Watching someone flail with a twist grip rudder setup is almost as funny as watching someone try to play car racing games online without brake and throttle pedals.
The refurbished part bothers me, but not nearly as much as the threat of having to use a twist grip stick. There's nothing wrong with the rudder paddles on the x45 throttle except that in my case, the pot is crappy and now it spikes continually so I had to set a deadband that is about 95% of the range of motion. But it still works, and it's never been a problem.