Quite frankly, DE and Injector razors have a romantic appeal to me. I have warm remembrances of being a kid and watching my dad shave with one or the other. I have spent a small fortune buying various DE's and injectors to find one I can shave with. I think they look great and I wish I could find the perfect one.
I must have super- sensitive, skin. I can't get a comfortable shave out of any for more than two days in a row. I have tried various: brushes, pre-shaves, soaps, and creams. No luck! A fusion or mach 3 works better for ME. The light, weight of the factory, handles might very well have something to do with it.
By chance have you tried something like the Merkur 23c? The razor has a longer handle, and the weight is only a small amount more than a cart razor like the Schick Hydro. It's my daily razor, and I too went through several trying to find an agreeable one. For injectors, I have one of the most modern "L" type. I've read they got progressively milder the newer they were, so I went with the newest model I could get my hands on.
Speaking of the Schick Hydro, I just recently managed to win an auction with 23 Hydro 5 disposables for all of $10. The heads can easily be moved to a regular handle. This is why the costs are overblown. Sure, if you walk into your local market and pay retail, it can get pricey. But just like those scoring bargains on vintage DE razors, carts can be had at good prices too if you're willing to stay on the lookout for good deals.