Many of us got the F3 as the nearest GSM equivalent to the Motion, with the unfortunate exception of not as much internal storage. I've had mine over a year and I'm still happy with it. Unfortunately it's not available through Metro any more although they may be had elsewhere. There is the F6, which is similar to the F3 but a bit bigger and with a smaller battery (big battery/great battery life is one of the best things about the F3).
The Galaxy Light doesn't look bad and isn't expensive, but the one thing that stands out is the battery. Only 1800mah so battery life on this phone isn't going to be very good.