Jstuart,
I have no experience with the Brno 21 or Husqvarna 146, are they Mauser copies?
This is a model 21 in 7x64 (mine), it is basically a refined small ring 98 with dovetails on top.
This is a Husqvarna 146 (picture from internet), these are a large ring 98 and can be had at very reasonable prices, and were I starting out I would definitely be going the Husqvarna 146 route.
This is a 146 (not mine) that a fellow on another forum has modified...and I for one think it is a cracking job.
I honestly do think the Husqvarna 146 is the very best buy to be had in quality/dollar terms.