Both of my chargers that are in regular use can display individual cell voltages, but i have raced with a couple of guys that have shultze (SP) chargers which are very good and have 2 outputs but only 1 has an internal balancer and can display cell voltages, they use
this balancer, it has an LCD display that can show all the cell voltages at the same time, rather than scrolling through them one by one making it much easier to read and works very well, it has been discontinued now though, quite possibly by
this unit which I have not seen in use but looks very much like an improved version of the other one, with indications on the LCD of what mode its in and which cells are balancing, and at $24 it will probably get to your door for less than the other one even if Amain is local to you so you can pick it up.
Hot Bodies Lightning 2 Pro carbon, Mega 22/30/2, MMM, 4s3-5Ah.
Tamiya F201 carbon, Mamba 7700, MM, 2s A123 2.3ah.
Xray XT8, 1518, MMM, 4s5Ah.
Lots of boats.
fastelectrics.net