If you have no other 20, why, yes, the H&R 20s are a nice place to start. Though I preferred a recoil pad on mine (it has now gone to a young man who 'outgrew' his youth 410), the hard pad was OK with my factory 2 3/4" #6 loads. Where it not for finding a pair of doubles (a SxS and an O/U), each under 6 pounds, I would have kept it.
The 20s are a lovely gauge.