You should notice quite a difference if going from full knobbies to slicks, semi-slicks, or inverted tread tires. At least I did. All the above mentioned tires would be good choices, IMHO, depending on your particular application. I have these in 1.5 on my mountain bike. They're great on road, gravel, and grassy and hard packed stuff. I haven't had them on anything else, and I don't use that bike for commuting. I would probably go with something like that Nashbar, or the WTB, or even a pure slick, if commuting any distance, and all on-road.