I'm investing in TSP and I just noticed they have different investment options (L, G, F, C, S, I). I know next to nothign about investing and I was wondering if anyone has any advice as to which investment fund i should go with. Also, what do you guys think about Roth IRAs vs TSP. I hear TSP kind of sucks for military since there isn't any matching plan. Do you guys use one over the other or invest in both? Help a fellow out with his cash-money.