Digital BW, The Print

I looked through the archives of the Epson scanner forums but couldn't seem to find a 
direct answer to my question so here goes...

I use an Epson 3200 to scan B&W negs for printing and have generally scanned my 4X5 
negatives at their original size and at 1600 dpi - so when the day comes, I can print 
11x14's at 600 (or so) dpi. I'm new to this brave new world so I'm wondering if other large 
format photographers in the group have a different take on this. I want to scan at a high 
enough resolution to preserve detail, but not too high a resolution to aviod HUGE 
Photoshop files.

Thanks for any help you can offer

Phil C.