As it turns out, I have extensive experience with both of these mics, and have used them both as main vocal mics. The Solid Tube is a good mic for high SPL's (read Rock and Roll). It sounds dark and distant until you remove the stupid internal pop filter, and many who use it also replace the tube with a Telefunken. The NTK is smoother and not as dark, but lacks the Solid Tube's bass rolloff and pad.
The Solid Tube has gotten a lot of bad press, unfairly, I think, because it was rolled out at too high a price point, and got a bloody nose in honest price wars with the likes of NTK and SP T-3.
Now that the price has come down into the range you are quoting, I think it is a very good buy. That said, I traded mine even up for an NTK because the Rode simply fits my voice better. It should also be noted that the AKG fits the voice of the guy I traded it to better than NTK. All that aside, I think the Solid Tube is a better mic. Aside from the bass rolloff and pad, it comes with a decent airline case. The cable that comes with the Rode is better, though and your going to be pretty much stuck with it. Solid Tube also comes with a shockmount, unlike NTK, but don't try to hang it inverted!
In the end, I believe Solid Tube is an excellent vocal mic that needs to have its internal windscreen ripped out. Even though NTK works better on my voice for most purposes, there are a lot of times I wish I had
my Solid Tube back!-Richie