Ive been playing around with many types of Antialiasing to try and get my foliage, trees looking better and have come to the conclusion SSAA + FXAA looks the best but with SSAA on my fps literally halfs. So is there a mod which can enhance the AA to look as good or better than SSAA but without the performance hit? Ive tried SMAA but that looks worse than MSAA in my opinion.

Heres some screens i took comparing them all:
http://img835.imageshack.us/img835/8759/smaay.jpg
http://img201.imageshack.us/img201/5238/4xmsaa.jpg
http://img210.imageshack.us/img210/3159/4xssaa.jpg
http://img585.imageshack.us/img585/3189/4xmsaafxaa.jpg
http://img688.imageshack.us/img688/9746/4xssaafxaa.jpg

Ive had a look on the nexus and found various mods such as fxaa post process injector http://skyrim.nexusmods.com/mods/131 and sweet fx http://skyrim.nexusmods.com/mods/23364 but i dont know if they will help at all with the effect im trying to get. Anyone used them? I would like to get my trees as looking as good as this enb for example http://skyrim.nexusmods.com/mods/11318 but without having to use enb. They always look nice in enb's but thats about the only thing that does.