@RedCrow The Sigmus 9? Really? Dude, the Terralyte III is better than the Sigmus 9. If you only have one more level until the Anova, then you should have figured that out by now. Put a Reflex Sight on the Terralyte III and you have a heck of an assault rifle. As for SMGs, the Vargen and whichever one has the 40-round clip are considered the best two, at least before the strata is unlocked if nothing else.
@Yoshi777 The Masterton is pretty good, as is the Ivana, but I think they are pretty much tied, depending on circumstances. Masterton is best for shorter ranges, although it has a much larger range than the other shotguns due to its rapid-fire ability, allowing it to be pretty good at mid-range and even at long-range somewhat. It's also great for kill streaks, since nearly every shot or two kills someone if it hits. The Ivana is better for accuracy, and thus for mid-range and long-range (some people are even really good with it at short-range), but it doesn't grant a kill as often in some cases, meaning you are more likely to get kill streaks if most of your kills are at mid-range or long-range. You also have to reload more often due to the amount of bullets that are often fired by the time the target is killed, so you are left vulnerable more often. It basically depends on what you are best with, what you prefer, and how you are doing at the time. Sometimes I do better with certain guns, whereas sometimes I do better with other guns in the same situation. It mostly depends on preference and skill.