Im planning on buying a new controller(PWM) to replace the Chineese controller that I currently have. Panels are about 850 watts configured for 12volt system.I might upgrade my system in the future but not more than 24 volts. I need some advice which would be better, Morningstars TS-60 or xantrex's C-60. What im really after is about their reliability compared to cost. TS 60 is about 260 bucks including shipping with 5 year warranty. C-60 is about 200 bucks with 2 years warranty. I expect these two brands will last way longer than the warranty period, but up to when? Has anybody have idea regarding their lifespans? Has anybody experienced failures right after the warranty period? Any bad experience with these two brands?