Linn Sondek LP-12 tonearm recommendations?

I just bought a Linn Sondek Lp-12, it had a Rega RB 300 tonearm... would I be better off sending this arm in for a cardas rewire?

@rbtstock I rewired the Rega arm, with VdH pure silver mono-crystal wire, straight thru from cartridge-output to preamp-input – a continuous length without a single break.
I wanted to hear majestic improvement, but the difference was barely discernible. And if you plan to spend 2–3K — well, mine cost under $200 including the wire.
A better arm is a better bet. And a better arm probably has better wire to start with, so it’s not even a issue.

Been using an Ekos II since perhaps 2002; I have zero regrets and have never considered changing arms. It's an excellent arm. 

I always liked the Naim Aro, but another good one that works and is unipivot, the Roksan NIMA. Nice arm. FWIW

I have a superb Audio Origami PU7 on my own LP12. A truly excellent arm.
However, it is also very important to upgrade other parts of the deck to get the very best out of any tonearm and cartridge.
you haven’t stated how old your LP12 is or anything else regarding the rest of the spec of it.
Disclosing the rest of the spec would be very helpful, especially as some older decks are not worth extensive upgrading. Also, other upgrades should be relevant to improving your current spec.

Linn does indeed recommend an inside out approach when it comes to upgrading the table. Therefore, the arm is fairly low on the totem pole. However, I personally found that replacing my Linn Basik Plus with the WTA ’Black’ arm was one of the easiest heard upgrades I ever did. The increase in SQ was more obvious than the sub chassis upgrade...although both did push the SQ forward. The arms available for the little fruit box are very limited, as discussed above...and many alternatives simply will not work well. ( like the SME’s, in my experience). The LP12 has its failings, the biggest one IMHO, is the inability of the table to allow not only multiple arms, but also more advanced ( and usually heavier) designs.