You also have the various Digital Workstations that have 4, 8, 12, 16, 24 tracks etc, effects, amp simulators, equalizer, reverb, chorus/delay, drum patterns, CD burner etc.
There are some good, very versatile units out there that allow you to record, mix and master and burn to CD. Most units will have a USB port for connecting to a PC.
A decent pair of near field monitors will also be a must for achieving a mix that will translate well onto other stereo systems, eg car, boom boxes, home stereo's.