If your engine makes power over 6500 RPM and you take it there on a regular basis then a set of limited travel lifters is not a bad idea. There are dedicated lifters (JIMS Hydrosolids, others) and there are travel limiters (SnS) that can be used with "standard" lifters. A "high performance" hydraulic lifter should have optimized bleed down rates, better check valving, improved oiling for rollers, etc. Many claim to be "high performance" lifters and are nothing more than re-labeled standard lifters. Unless you run at high RPM or have unusually high valve spring rates it's pretty tough to beat the stock HD "B" lifters or HD "B" lifters with travel limiters installed.