Sayers...
Sabre branded from Flying Performance (for memory) have a good product.
And the fitment was absolute schmick. Id recommend them in a heartbeat. Mines 42mm, I did a heap of research, and I found the consensus was too thick was adverse... So bigger is not always better.
That said, its a 42mm core now, (OEM 20mm), and works great behind a fair sized FMIC. I paid about 400ish?
Brent.
[EDIT] Excuse blurro-vision pic, but so you can visualise. 42mm is not OTT.