I hadn't really realized that I'd amassed a small collection of packers/etc, but lo and behold, there they are. Here are my faves, sorry if I wrote too much about them!
Plain packers:
NYTC Archer: (5", silicone) Hands-down my favorite packer to date. It's got great squish, and it's silicone, so it's easy to clean and stands up to wear and tear much better than my cyberskin packer. It's pretty sizeable, but has never looked too large or out of place in my briefs. (New York Toy Collective does offer smaller versions of both the Archer and Pierre packers). It's not as realistic as the brands that use life-casts, but it's a great packer, and it's much more affordable than some other silicone options.
Masho: (3.5", cyberskin) Honestly, I am a huge fan of this packer as a budget option. I mostly use it when I go to the gym or ride my bike, since larger or denser packers can be uncomfortable on long rides. It's great in a jock strap, and while a little small for some, it's fine for me for the things I use it for.
FreeToM Buddy: (3.5", silicone) I got this with Paint Plus, and it's the prettiest packer I own, hands-down. It's about the same length as the Masho, but at least twice the girth. It looks so dang realistic, and if only it had better squish, I would wear it forever, but it's much firmer than I like. It doesn't poke out or look obscene in clothes, but it's just not comfortable for me. On the other hand, it's firm enough to be fun with a partner, and might be exciting for a date night? It's so pretty, though.
STP Packers
FreeTom Buddy (STP): (3.5" + cup, silicone) I bought this one (without Paint Plus) at the same time that I bought the Buddy packer, and it's very nice! It was weird to have a hollow packer at first, but it's comfortable and easier to pack with than its solid counterpart. I only really use it for camping or long hikes or if I'll be in town all day, but it's a perfectly nice packer, and very realistic in form, even without paint plus.
Other:
Vixskin Bandit: (7.5", silicone) Um, so, as far as strap-ons go, this is pretty rad, even if it's not 'life cast' realistic, the dual-density thing means it's still plenty lifelike. The balls aren't great, but hey, I didn't buy it for the balls. Additionally, I was able to bend it into a packable position, although I'm not sure that (for me) wearing it to a date would be worth the constant fear of it escaping the confines of its jock strap prison.