youre gonna have to do research yourself. nobody here will know what bass is best for you. it depends on the style you play, the sound you want, your physical size and strength, what you want it to look like.
do some research as to what sound you want, and then go from there.
on the other hand, your post makes you sound a bit of a no0b, and as such, a MIM jazz is plenty of bass for you. you dont want to go messing with fodera or sadowsky unless you really know what you want.
also, consider modding your MIM Jazz. i just did it to one ive had for a few years, put new pickups in it and turned it into a fretless. now its my favorite bass again.
FYI the main difference between an american and a mexican jazz are the pickups, get a decent replacement pair and it will be night/day. and MUCH cheaper