Thanks nitelight. :)
That depends on what specifically you want to use them for. Part of the appeal comes from the fact that the 962 and the 905 are becoming increasingly hard to find and, like most of the 900 series, will be sold out pretty soon. In that sense, they're collector's items.
For me, personally, the EL-04MCT is what the 962 should have been (only smaller). It's a looker, for sure, but it can also get the job done, whereas the 962 never felt like I knife I wanted to do actual work with. Personal preference plays a huge role here, but the lock wasn't quite smooth enough for my tastes and the scales weren't quite grippy enough. It's a nice knife but it's not for me.
The 905 is one of those knives that remind me what SRM was all about, before they decided to branch out and focus on the likes of the T08. At that price point, it's an all-around good, well-made knife. I don't actually use mine often, but I like them. Anyway, the 905 is severely underrated, in my opinion.
The 939, on the other hand, is a knife I do use and I enjoy doing so. I think it's excellent. The new black version is still widely available, but you are unlikely to find it for much cheaper than ten bucks. I like to save money, but I also reward service and if Exduct's prices are reasonable, like in this case, I will give them my business.
Compared to the EL-01, which is more of a tactical folder, you got three very different knives. The 962 has an axis-lock and Micarta handles. It's more likely to scare bystanders than the 905 with its polished blade and wood scales. You can still flick that open and it will cut just the same, but then that's sort of like comparing a Model 700 to an assault rifle - both are tools, both are potentially lethal but somehow one is scary and the other one isn't. I can't say I understand that mindset but oh well.
The 939 has a sheepsfoot blade, which is great. And even though most people don't know the original purpose of that blade profile (ie. to trim the hooves of sheep, hence the name), they generally recognize it as a work knife. I believe GWO still has the original silver version, which has even less of a tactical look to it.