I've been reading a lot about Metal Heroes for no particular reason and now I have a bit of a hankering to watch a Metal Hero series simply because, outside of what Saban brought over, I've never actually seen one.
Are there any interesting ones that are subbed out there?

Oh? Well, damn...That really is kind of a bummer, especially to drop it 4 episodes left?

Metalder is actually missing about ten episodes - mostly the 20s. The main subber was Dead Fish, who always just subbed whatever episodes they felt like instead of going in any sort of order.

I'd recommend giving it a shot anyway. All the plot critical episodes are subbed and none of the unsubbed ones are complex enough that they can't be followed raw. Plus it's just a really, really great show.

If you want more active subs, though, MillionFold Curiosity is regularly releasing subs of Gavan. I never got into that show, myself, but it has one of the best theme songs ever.

Winspector is only 9 episodes away from being complete as well.

Here you go :D

Megabeast Empire is about 3/4s of the way through subbing Juspion. Releases have slowed down a lot recently though.

I forgot to mention it, but some of the Metal Heroes shows also have passable HK subs. I know Shaider does and I think you can find HKs of Metalder, too.

Where can you find the Shaider ones? That might be something I'm willing to subject myself too lol. I am watching Millionfold Curiosity's subs of Space Sheriff Gavan and enjoying them immensely.