After reading some more and talking to my friend that suggested the Aneros, it doesn't seem like the MGX is the right size for me. It seems like I need it to be a little bit longer and a bit fuller.
I was very hesitant though because I bought my MGX at a toy store with a ridiculous markup on the price, and was reluctant to drop that same amount of cash on a Progasm. He has a Progasm and based on his experiences plus the product specs, it seems like it will be the right "fit" this time.
Anyone else make the switch from an MGX to a Progasm for the same reasons?