I too have had near driver speed with the standard SIM 15.Standard SIM 3w 15* is a monster!! it got to within 3mph ball speed of my driver. Easily the hottest 3w face ive ever hit and very controllable... id have to think the 14* rocket is even better for anyone who wants it as a driver replacement
It's seriously crazy how fast that thing is.
The 14 wouldn't be usefully long, I don't think. Just long. I put the 15 up against my mini and it obliterated it.