help with h/c/i for newb

A good intake for idle to 5800 is the performer. The street heat is better from mid to high rpm.
Kevin

Which vehicle? Auto or manual? Rear end ratio? How will it be used? Emissions? Fuel mileage? Carbed or efi? What kind of shape is the short block in?

Before you can select or others can help the single most important part of the process is you getting clear about what you're trying to accomplish. Which part of that 'idle to 5800 rpm' range is most important to you -- idle to 3000 (where most street use is); 2500-4500 (midrange) or 4000-5800? The answer to that along with the other bits will likely dictate your cam choice.

I'd suggest going here ( http://www.wighat.com/fcr3/ ) opening all the tabs and reading about cams. It's the area where you can make the biggest mistake. I'd suggest letting one of the custom designers help you with your cam choice. Not much more expensive than an off the shelf (relative to what you're spending) -- but much better choices can be made. Buddy Rawls did my custom cam -- best choice I made in the entire engine.