Agree with all the comments about the 103, and how to use it. My day-to-day cartridge is a 103R, which is in a 20 gram headshell on a very heavy stainless steel arm (FR-64S) ... the heaviness being essential to getting it to work effectively ime. TBH, I wouldn't bother trying it with light/medium mass arms, as that's not what it's designed for.
Here's someone who is playing around with a 103 ... http://jeffsplace.me/wordpress/?p=12537
Quote .. "The stock Denon DL-103 has a somewhat tipped-up top-end and a slightly emasculated & unresolved bass response". Makes me wonder if he's ever had one set up properly!
In terms of cartridges for 'normal' arms, I'd seriously consider a moving magnet Audio Note IQ1. It has much the 'body' of something like the103, combined with a good dose of the detail retrieval that better mc's give. It retails for around £340 now. I much preferred it to an AT-33PTG/II, which I found a bit 'insubstantial' in its presentation.