I have the cycleops rollers; i.e. not the cheapest, but not the most expensive either. They have grooves. It's nothing to agonize over. I doubt it would even make them quieter; most of the noise is from vibration from the rollers being slightly out of round and out of balance (it'll never be perfect, but generally, the more expensive the rollers set, the more round and balanced the cylinders - it's not just the machining, it's also the alignment of the axle and frame and the tolerance of the bearings).

The gold standard is the Kreitler alloy rollers; it doesn't get any better than machined aluminum endcaps with corresponding gold standard price. Trackies love them because you can spin them up to over 3000rpm (40+mph) without feeling like you're trying to balance on a washing machine.