RE: which plane is a good choice?
No, LiPo won't do any damage to your motor or speed controller, it's just larger than you need for a plane that size. With that larger battery pack, your gaining runtime at the expensive of added weight, so the plane won't fly as well as it would with the smaller, lighter pack. Since that's what you have right now, you can always use it initially in your new plane, and if you find you want it to be a little more aerobatic, you can lighten it up by buying some smaller/lighter packs with ~1000mAh capacity.
I've got a Himax motor setup with a little higher power rating (12A continuous, 14A peak) that I fly with 3S 1200mAh packs. That is installed in a blue foam plane I designed and built. It's a little heavier than a standard profile foamie, I think it's about 18-19oz RTF. It has OK sport performance, but not a lot of vertical or 3D performance. I'm just thinking if I put one of my 3S 2200mAh packs in it, that extra weight would make it a real dog!
Bottom line is, if you can keep the all up weight low enough with your 2300mAh pack, and the flight performance is acceptable to you, then you're set. Otherwise you can get a smaller pack and make it more aerobatic.
Hope that helps!