I'm putting together a home battle station that incorporates multiple synthesizers, drum machines, guitar channels and a computer. With no room for a full size mixing board I opted for a Tascam Model 12, supplemented by a Samson patch bay and the 1602 V2 line mixer. It does what it does without fuss, and lets me mix in extra devices without mucking around with the Tascam.
When considering a line mixer, spend some time thinking about whether that is actually what you need. In some cases you might be better off with a multichannel digital preamp, a patch bay, or a combination of devices.