Best Budget Phono Cartridge?

@viridian -- thanks for your opinions, as always.  I have a few follow up questions:
- I'm tempted to return the AT440, since a) the sound is not blowing me away, and b) it will probably be a year before I'm ready to buy a new TT.  Your post makes it sound like I should just stay with it until it's broken in, and hope that I like it better then; wouldn't I be better off returning it, and getting an equivalent or better cart with my new TT?
- Regarding the tone arm mass, I'm trying to get some simple "rules of thumb" to guide my next purchase.  Your post made it sound like higher mass is generally better than low -- is that right, or does it vary with the arm/cartridge combination?  I've also heard that the traditional "S" shaped arm is now out of favor; do you agree, and if so, do you know why it's not as good as a straight one?  Is a single bend in an arm better than an S, or should I just look for a straight arm?  Inquiring minds want to know...
Thanks again,
Casey 

@viridian
 -- thanks again for your response; I had forgotten about your recommendation of the MP110, and will probably try that if the Stanton replacement stylus doesn't sound good.  The reviewer at the link you sent was certainly very enthusiastic about it, and UNenthusiastic about the 440MLb - I thought unfairly so.  It made me wonder if he has any interest in pushing Nagaoka sales.  
You mentioned a used Sl1200 as a good bet for a moderately priced turntable -- do you have any thoughts on the Sl1200 "look alikes", such as the AT1240 or Pioneer PLX-500, which can be had new for less $ than the used Technics?

Sorry I it's ADC type III, IV cartridges. They're sleepers and can be purchased for very cheap something like this one -- https://www.ebay.com/itm/ADC-XLM-MKIII-Cartridge/272995643280?hash=item3f8fceef90:g:Bi8AAOSwxzdaGHMB