It might help to know that the Reedy Quasar Pro and the Integy 16x5, 16x7 and 16x9 chargers are all made by Eagle Racing. Have a look at http://www.eaglemodel.com/
for their line of chargers.
Personally, I have owned the Integy 16x9 v5 charger for well over a year and have never once had a problem with mine. This charger has a pair of jacks in the back that I use to power a small second DC charger to keep my transmitter peaked at all times. This is a very nice charger that can also discharge and cycle packs. No memory slots which is a bummer and it is a bit limited in the number of cells it will charge, but is otherwise a great charger.
A club mate runs the DC version of the 16x5 v6 and his charger has also been bullet proof. This charger has better features than mine and can charge 1-10 cells, and does show the IR of packs which is nice. You can also turn the trickle charge off which is something my 16x9 won't allow. The 10 programmable memory slots on this charger also make it very versatile.
The 16x7 chargers had problems in the past and the new v6 version looks nice but the dual fans seem to run all the time and are quite noisy too. I'd buy the 16x5 v6 over this charger if I had the choice.
The Reedy Quasar Pro is OK, but you would need to be sure that the factory upgrade had been performed on any used ones you might be considering. The lack of a backlit LCD also makes reading the display a problem in some conditions. I had one that dies while charging only the third 6-cell pack I tried. I had mine replaced with a new unit from Associated but sold it immediately as I wasn't about to take another chance. I'd pass on the Reedy charger for sure.