Reading blockend's original post, I note that he mentions using a flatbed scanner to produce his images. He states he was running his scanner at 3200 ppi, which, if you know anything about flatbeds, is hopelessly optimistic. The very best flatbeds can maybe eke out 2400 ppi, but most good flatbeds, like my trusty old Epson 4990, which was Epson's best scanner prior to the introduction of the V7xx models, can't do much better than 2000 ppi. I have found this resolution to be too low if one hopes to achieve critically sharp 35mm images. Yes, it might be fine for a monitor, but not for prints.
Many of you have stated that you use good ol' optical methods like enlargers, which are obviously superior to flatbeds. I don't have a darkroom anymore, so that route is closed for me, but there are times I wish I still had my old Simmons Omega enlarger and lenses. These days, I will digitize my slides and negatives for output to a photo quality printer, and I prefer to shoot duplicates using my 24.3mp digital camera for this. I can get 6000 x 4000 pixels of actual resolution that way and I can wring out just about all the sharpness a 35mm slide or negative has to give at that level of resolution.
Now, I understand this is APUG and all, but I'll wager a lot of the folks here are like me and have hybrid darkrooms these days. I have a printer that does a good job with up to 8.5x11 prints, but I've confined almost all my printing to color so far. B&W is a whole different skill set. If I need anything larger than 8.5x11, I take the image files down to my local Costco and have them print out the enlargements on their large format Epson. This is plenty good enough for my purposes. I have images I've duped from Kodachrome and Velvia slides that can easily hold resolution up to 16 x 20 and larger. At 100% image size of a 6000 x 4000 duplicate, that's a 30" x 45" print. Plenty big enough for me. With those fine-grained emulsions, even at 100%, grain is barely evident from a foot away and not visible at all from three feet. And if I've used a good lens, image sharpness is still hanging in there, even at this extreme. Although I'll freely admit that such a large image is best viewed at a slight distance, say six feet or so. And it looks even better from a bit farther, say from ten feet away, which is roughly the same as holding an 8x10 print at arm's length. So, no surprise there, I suppose.