Which is the Better Tonearm - Pro-Ject or Rega?

The Rega arms are cast alloy - compared to other arms they are very stiff and by comparison to other materials they are more acoustically inert - that's what makes them better than other arms.

Arms that use alloy or composite tubes, are not as stiff and can be acoustically active (they vibrate)

Jeff at Audiomods has taken the Rega arm tube further and  found a way to make them even stiffer with internal bracing and improved the acoustic damping by drilling holes.

The Audiomods arms only use the Rega arm tube - everything else is all Jeff's design and fabrication.

For the price, they are a great upgrade to a stock Rega arm and mkae a significant difference.

Regards...

Rotarius - here's a link that explains some of the advantages of casting. Granted, it talks to steel, but wouldn't the same be true of any metal?

http://www.afsinc.org/content.cfm?ItemNumber=6931

One valid point about casting...

"It puts the metal where it is needed"

Here's another link that measures attributes of the Rega 301 arm against other arms...

http://www.hi-fiworld.co.uk/index.php/vinyl-lp/70-tests/104-arm-tests.html

Also a quote from Wikipedia...

"which has a now tapered cast alloy tube[22] that offered greater rigidity and better control of resonance"  

As for your statement...

"So maybe Rega uses cast pieces for economic reasons"  

It took them over two years of R & D to get it right -  "economic reasons" - I doubt it.

What you say may have some merit, but I think Rega's reputation and track record carries more weight than your conjecture.

Regards...

Greg - a comment on the  the Audiomods review by 6Moons - it  was completed in 2012 - Jeff (Audiomods) appears to have taken note of comments from that review - the more recent  arms now come with much better ceramic bearings :-)

I have the Series II with the new ceramic bearing and I cannot detect any "bearing slop" as noted in the review.

Regards...

Greg - even if you don't try the Audiomods Arm - give the KLE Innovations Absolute Harmony RCA's a try on your Project 9cc

They will elevate it to a whole new level of performance

Fightin words you say? Take a look at...
http://image99.net/blog/files/cf662af46f47abf6d812010ad97da98e-49.html
http://image99.net/blog/files/1621fffaa60c22b5f8210f57d628f961-58.html
http://image99.net/blog/files/a8494e8645dea3d750d109f819103099-61.html

I've been fortunate to be able to review most of the KLE Innovations product line over a 2-3 year period (nice being retired) and have even field tested some of them on friends systems.

To date I have not found a product that outperforms their TOTL products. But even their entry level products outperform many big name brands 

And if I didn't have already have the Audiomods arm - I'd take advantage of they weak pound also :-)

Regards, Steve.