by "larger" do you mean longer than 17cm? or sheet film(4x5-8x10, or bigger?)
I'm saving my pennies to buy a drum scanner, since I treat ALL my film with the utmost care in terms of exposure, processing and handling once processed. For me, a drum scan is the best way to really access ALL the information in a piece of film.
now, I shoot mostly 4x5 and 8x10, so for me a drum scanner is almost the only option. I don't print large(16x20 is generally the biggest I go), but in order to get the highest quality out of my film, and the flexibility that a drum scanner gives you really helps in the long run.
now, most people don't have an extra $5k-$10k just laying around. Drum scanning is an art IMO.
Epson flatbeds are what most people use, and I've got great, fast results out of them. But in the long run, why not just go with the best from the start?
eversmarts/iqsmart's (from Creo or Kodak) are great, and Fuji has/had the Lanovia scanners(comparable to the Iq/Eversmart's). Imacon/Hasselblad Flextights are able to handle 6x17 as well(with a panoramic film holder). They give great results as well. Its what I'm using until I have my drum scanner all set and ready.
also(another + for the drum scanner), is that you can batch scan MULITPLE pieces of film simultaneously. This allows you more time away from the scanner, and since drum scanners are designed to be efficient little beasties
, they are terrific machines all around(when they're being used/operated by a skilled person).
-Dan
