Kung Fu flash is probably all you need, with a few caveats (eg. With KFF the drive is "emulated" by intercepting kernal vectors rather than acting as a 1541 on the serial bus, so some software that eg. uses fast loaders or relies on the disk drive for offloading computation won't work).
If you want to get fancy you could go for something like an Ultimate II+ and a usb key, which will get you a bunch of extra functionally like network connectivity, extra SID support, pretty solid compatibility, REU emulation etc (but UII+ will also cost a lot more).
Given you've got a real 1541, maybe you could just copy files/disk images across to the real thing if KFF doesn't work for a particular program I guess?
If you want to get fancy you could go for something like an Ultimate II+ and a usb key, which will get you a bunch of extra functionally like network connectivity, extra SID support, pretty solid compatibility, REU emulation etc (but UII+ will also cost a lot more).
Given you've got a real 1541, maybe you could just copy files/disk images across to the real thing if KFF doesn't work for a particular program I guess?