Comparing NL to Limit Levels

[Reel Deal]

We all talk here about the different levels we play at... $1/$2 Limit, $3/$6 Limit, $10/$20 Limit, $25NL, $50NL, etc. I was wondering if anyone has an opinion on which Limit level is comprable to which NL level. In other words is the "talent level" at the $1/$2 Limit tables about the same as the $50 NL tables? Can you even compare the two?

Being only a NL player I'm curious as to what level would be best for me to try on a Limit table if I primarily play the $50NL tables.