Drop in replacement for Rega RB300?

I tried the Origin Live Silver and it was a nice arm, but to tell you the truth, my RB300 with upgraded wire and counterweight was 90% as good. I ended up selling the Silver and keeping my RB300. Plus the Silver is based on the RB250 and I just like the operation of the RB300 a bit more.

If I was to upgrade to anything now I'd probably try to find an RB700 tonearm.

If you haven't upgraded the wire in your RB300 DO IT! It makes a very noticeable difference.

thanks for the continued ideas, keep em' coming!

The Schroder M2 works with the mounting hole and geometery, but would require you to drill 3 mounting holes and either tap them, or use appropriate screws depending on which arm board you have. I know, I just swapped out an OL Silver [available BTW ;~)]for an M2. Its a bit hairy; you have to properly center the arm collar in an oversized mounting hole and then mark the mounting hole locations, then drill them accurately- A drill press is highly recommended. I did it to a monkeywood armboard and it brass (them must be non-magnetic) wood screws worked; if the wood was harder (cocobolo, ebony) or if it was a metal armboard, it would have to be drilled and then tapped for a nonmagnetic bolt (stainless or brass). NOT simple drop in like the Rega derivatives.

Thanks everyone for taking time to help.