Digital BW, The Print

I'm making the leap into B&W digital printing this year from the wet 
process, and I'm assembling the knowledge and equipment I need.  I 
have a pretty good handle on the printers and software, but need help 
on the scanning side.

I do mostly 4X5 with some 35mm.  Finding a 35mm scanner is no 
problem, but 4X5 is another story.  Outside of a $14K drum scanner, 
about the only other ones I see are flatbed reflective scanners with 
a drawer for negs.  I've been told of problems using these for 4X5.  
Also, I'm not sure about what resolution I should shoot for when 
taking 4X5s and 35mm negs to 11X14 digital prints (for comparable wet 
process resolution).

Can anyone point me to a website, newsgroup, or Yahoo group that 
could provide help?

THANKS!