I really don't get on with injectors, but many do. The one I do like is the Gillette Twinjector, which is happy to take regular single injector blades. My preference is for NOS Gillette Platinum blades which are increasingly hard to find.
Single edge Feather blades can be used in GEM & Ever Ready razors, but you do need to split the spine off a used GEM blade and drop that one the back of the Feather - that makes for a different shave.
In terms of other SE razors worth a punt, I'd suggest you also look at AutoStrop Valet for a VC1 and a VC4 (which has a straight guard). They will take Feather blades or de-spined GEM blades. Older GEM & Ever Ready are also nice - I like the Ever Ready 1914 and the older curved cap GEMs: Damaskeene, for example.
If you can work up the ginger to give a Rolls Razor a go, you'll enjoy that as a novelty. I'm also a fan of the Gillette Techmatic (band razor) which gave me a quite excellent shave the other night.
Have fun ...