While a neat idea, I'm afraid it is really like asking folks for an anchor recommendation. You might as well list every one ever made. Most anything will get one vote.
btw, I see you edited the OP. Having the same 10k price brackets at each boat length isn't quite right and maxing a 50+ footer, let alone 40 to 45 (you skipped 45 to 50?) at 70k is rather limiting. For that matter, spending 70k on a 25 footer would be astonishing.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.