Eric,
if you can tolerate the slow speed, Photo Warehouse (www.ultrafineonline.com) has 8x10 and 14x17 dupe film that's ortho response and inexpensive as hell. The downside is an EI of about 6. But a beautiful tonal range and that classic ortho look.
If you can live with the speed, the pricing is right (less than $1 a sheet for 25 sheet package, something like .85 a sheet by the 100 (for 8x10 sheets). I'm getting to the point where I prefer the ortho look for a lot of my scenic work, though of course sky's are a pita.
Eric,
if you can tolerate the slow speed, Photo Warehouse (www.ultrafineonline.com) has 8x10 and 14x17 dupe film that's ortho response and inexpensive as hell. The downside is an EI of about 6. But a beautiful tonal range and that classic ortho look.