If you are set on getting a 19t motor which it sounds like you are. The brand you buy is going to be based on how much you want to spend. If you are looking for a cheaper budget friendly 19t look at motors like the Trinity Chameleon or the Reedy Quad magnet. If you want a real race motor look at the Fantom motors, Checkpoint Money, Orion Element (all 3 versions are great), or the Trinity Komodo. The Elements and the Fantoms are my favorite because they run strong for a long time before needing to be cut. The Money was a very good motor for me until I bought the others and the Komodo is a good motor if you get a good one. I had 4 of them before I got one that ran as strong as the others. I know there are many places selling the fantom motors as there own special tweaked version but I found that if you buy them straight from fantom you get the better numbers. The 1st one I bought dyno'd at 26,700 rpm at 5 volts and that is better than most 15t mods on the market.