For wrenching, I will have to go with the MGT. The pan style chassis makes it that much accessible to service. The LST has the unique style. I like the LST but to wrench...its a PITA. My Old LST racer was turned into a basher. only stripped spur gear due to it landing on its lid...without the lid. This shiffted the engine mount and chewed up my spur. I replaced it and that was it.
For speed, the LST's Mach 26 was great and I hear the mach 427 is better. So keep looking or ask away. I can tell you we have threads started already you just need to do some research here.