Not micro-chips, super magnets. Duh! In all seriousness, another vote for banshee. It's tougher to forehand an understable disc because a forehanded disc gains speed quicker than a backhanded one, therefore high speed turn kicks in faster and can lead to a quicker turnover. If you can manage to get the feel for flicking understables, you will have gained a valuable skill and will get more distance. That being said, if you need to forehand <300ft I will recommend sticking to the overstable banshee all day.
This is the right awnser if you want to be a FH noob your whole life. Flexing overstable stuff has its place, but if you want to be able to shape lines it is in your best interest to learn the understable stuff. If you stick with the overstable disc's your form will not improve anywhere near as fast as learning understable disc's. It will probably get even worse. If you only want to have a FH for FH hyzers and big flex shots than by all means only throw overstable disc's, but it sounds like you are looking to improve your overall game. You are taking the right step by discing down, and if you want to continue to improve its best to learn all different stabilities. I have an injury that has forced me to play about 80% FH and I have had to learn the hard way that Flexing overstable disc's will only get you so far.