I am using the 125b in my RC8 and I really like it. So far, no major heat problems yet, but it does get warmer than I would like after about 15-20 minutes on a track. I would buy that new ESC if it doesn't have heat problems.

Personally, I rather pay for performance. I would gladly pay a couple hundred bucks for an ESC that works flawlessly. Let me repeat... FLAWLESS. In fact, I wouldn't think twice about dropping 400-500 bucks for an esc that I know will never have heat problems, will never cog, will never have ghost in the machine problems like full braking while the car is in neutral and any other problem these manufacturers can't seem to figure out.

My only hope is that the rumored MMM will solve all these issues. I have a lot of confidence in them given that we can pretty reliably use the standard MM without too many issues, so I would hope they can make a purpose built ESC for 1/8's that doesn't have any issues.