Brushless ESC's

[cheesyd]

I have a Losi Xcelorin S ESC that i think has just died. It powers up however the power is no longer delivered smooth. I have reset to Profile #2 Modified and reset up to my transmitter but still have the problem. Does anyone have any ideas?

If it is kaput then I need to buy a new or used replacement. Can anyone suggest any quality ESC's? Im a serious racer and want to keep up with the best and was thinking about Tekin RS Pro however nearly £200 is a bit above my budget. I know thats probably a contradiction but we all have a budget unless sponsored and I need other things. I dont mind paying £120 for second hand but what if it breaks??? repair costs?

Please give me your thoughts and experiences as in dilemma which is stopping me race :-(