1) Benchmark SPM-320 for analog metering
2) Mytek DDD-603 for digital metering
3) DK-Audio MSD200C, for both analog and digital metering.

The first two seem to provide a solid high quality metering combination. The 3rd is an alternative do-it-all box with LCD display which not only meters, but does analysis functions (like SpectraFoo) and has a pair of A/D and D/A converters.

Any experience?