Ok, using German to get my alliteration isn't fair. Too bad.
On Ebay, I picked up a squad of 6 painted "Spartans" (Halo style, not 300 style) , which are actually THW "Symon" figures painted in the classic Halo "green/gold" style. They're pretty cool, and the price was slightly less than buying the figures and having someone else paint them for me, so "yay me".
THW has finally released more figures in their 5150 line - the Hishen and the Grath, which I have also picked up. In both cases, I bought enough figures to make up a squad of each.
Hishen are nasty little halfling-sized clones who use weapons sort of like Phasers to help them capture (or kill) slaves. They are pretty wimpy on their own, but when they get into little buzzing swarms of 3-4 guys, look out - they combine psychically into one super-elite warriors in a sort of "Voltron" way.
Grath are BIG dumb brutes who fire .50 caliber machine guns from the hip. They're not actually single organisms, but are more like a Portuguese Man-Of-War in that they consist of a colony of mutually symbiotic organisms. Because of this, they're damn near indestructable (cut off the head - it's the only way) but not very sophisticated. Think "The Thing" from the '50s movie, only with a bit more intelligence and a really big gun.
Hishen are definitely "bad guys" in the 5150 universe. The Grath are organic weapons and will fight for anyone. Both are pretty bad news in their own ways, and fortunately have pretty simple paint schemes so they'll be fast to paint. (Hishen, being clones, all dress alike and Grath aren't really imaginative enough to want different styles)
So at this point, my scifi "arsenal" looks like this:
Ready to field:
1 squad of Spugs
1 squad of Symons
1 Starfleet Away team (could use some fine detailing)
Mostly Done:
1 demi-squad of Vargr (need fur and details)
1 squad of Spugs (just need highlights and eyes)
2 squads of "Appleseed" armored troops (could field now, but want to re-do armor)
2 squads of Hydrissians (One partly done, the other just primed)
Primed/Mounted:
1 squad of Mephalians
2 Sci-fi characters with armor and rifles.
10 or so Space Marines
A bunch of Tyranid stuff
Still "in the box":
1 "Land Mate"
1 Spugnaut
1 Mephalian Gort Beast
5150