The "best" 380 or smaller motor (rc18)

I run the Mamba 25... that is why I am hesitant to step up to a bigger motor, I'm afraid it will only cost more money by having to replace the 25.. Just curious, if my Mamba 25 happened to fry, and I happened to send it in to Castle for a replacement...would I get a MMP back? I don't think they still stock the mamba 25's. As far as that hobby city one I linked, it looks pretty good. My friend uses it. Geared 10/60 on 3s, he said it runs low 100's with about 30-40 minute runtimes. On a Rhino 1050 30C pack... Looks like a pretty good setup, I think i might go for that one. For $15, I don't really care if it fries.