Which Mono Cartridge at around $1,300.00?


I'm in the process of upgrading my well cared for Thorens TD145. I started by soldering in WireWorld phono cable along with getting a basic tune up. I want to replace my Grado ME+ mono cartridge with a substantially better mono cartridge. Currently, the tone arm is stock. My records are classical (orchestral, chamber, vocal, etc...) dating from the 1940's and 1950's so I've been cogitating on the Ortofon SPU Mono GM MKII or a low output Grado (i.e. the sonata reference 1). My phono stage is the ASR Mini Basis Exclusive. All or any suggestions would be greatly appreciated.
Thanks!
128x128goofyfoot
My skepticism lies in the idea of purchasing a MC cartridge below a standard price point. I'm not skeptical of the Miyajima Premium Mono however but nevertheless am entertaining the idea of a slight upgrade within a MM mono cartridge until I'm capable of breaking the bank. Podeschi, would you mind giving me that distributers contact info and URL?
Jonathan, re: the Denon 102. This quote comes from an on-line information article -

"Basically, the DL-102 is a high output MONO moving coil cartridge which has incorporated both vertical compliance and a 0.7 mil radius stylus, making it compatible with stereo LP playback and is intended for playback of both Mono and Stereo Records."
I don't understand the need for a mono pickup. I play mono records with my LPS and am very pleased....many times it sounds better than their stereo versions...
I found a price for the AT33 at $445.00. I'll admit that at this price it certainly is tempting.