So overall, I reckon pulling up expeditiously on the runway, straight ahead, and carrying out the correct drills promptly, initiating the evacuation promptly when required is the best option....just my opinion though
And if it is an engine fire warning that is the cause of the rejected take off, don't use reverse thrust on the engine on fire. The stopping distance on a dry runway in the 737 with reverse on one engine is practically (ten feet) the same as with two engine reverse. In the case of the Manchester accident, the use of reverse on the engine which lost the turbine blade and which punctured the fuel tank (big fire), atomised the released fuel and increased the conflagration.