I have the SpareParts trunks and I love them. I have really sensitive skin so I have trouble placing rubbery things directly against my body for any length of time. I love that the trunks give me a barrier that saves my skin from torment. HOWEVER. Well engineered as they are, $40/pair for underwear is just too much money for everyday wear. Also, I already hate the amount of layers I already seem to be wearing so the packing straps that would save my skin are just too much of a hassle. My solution was to buy underwear from TranZwear
. Don't let the retro look of their website scare you off. Their stuff is pretty well put together and very affordable. I really like the BulletBriefs system, and they offer different methods of attaching the packer pocket to suit different tastes/lifestyles. The only caveat is that when you order from them, you need to expect a month of lead time.
Sorry. That was a lot of words. tl;dr TranZwear
sells affordable packing underwear that works really well for me.