Yes a matched cam and spring set is always the safest way to go. A solid lifter cam can rev higher as the lifters don't rely on a cushion of oil like a hydraulic cam does. If that oil leaks and the lifter collapses then at the very least the valve doesn't open its full amount and in a worse case the lifter face and cam lobe are damaged and a bent pushrod often follows.
RPM and all that goes with it are nice but you really need to decide just what the engine is going to be used for and select parts accordingly.
A street engine doesn't need to rev over 5000 so as others have said " why go there?". For an engine that makes no more power or torque after say 4500 rpm, having a valve train that doesn't float until 5500 rpm only gives you a little more room in case you miss a shift.
Otherwise its like altitude above an airplane - useless.
Mike