You weren't really clear about what it is with the shavette that has you second guessing your decision. Are the shaves uncomfortable? Do you get cuts and irritation?
If the answer is no and you are still enjoying yourself then what's the hurry. You might even be able to save some money that way, too

. I certainly don't want to dissuade you from buying a real straight, that is not my intention...
BTW - you could always buy a low cost shave ready blade from the classifeds, which would leave plenty of money for a quality strop and perhaps an extra or two. Just a thought.