Michael,
Your "points per inch" are well taken!
It is nice to have a refresher on those facts. I generally just try to hit between 300-600 dpi/lpi for my final printed piece regardless of size and it has always gotten the job done.
Leslie,
Be sure to get yourself a decent CD-ROM burner with that new printer. You will not want to keep TIF files on your hard disk. Burn them to CD and keep them in a file.