If everything is agreed to, then it really doesn't matter which state you file in because most judges will approve agreed divorces.  Even though they use different terminology, most judges will strive to be fair and equitable or close to 50/50.  Texas is an equitable state, but many judges will shoot for 50/50.  The potentially disputed issue seems to be marital support.  If this is the disputed issue, you would be better filing in Texas as marital support is somewhat difficult to obtain in Texas.  Even though marital support is not alimony, it has some of the same historical anti-alimony biases....which would work to your favor if your ex- persisted in asking for excessive marital support.