Most of your export SSB radios are going to have some drift. They are known for it. An older Grant, 148GTL, 139XLR, etc would be a good choice for stability and clean audio. You can pick them up between $40-$100. Just be careful not to buy one that has been modified to much. My Grant was purchased for $40, I sent it out to be looked over and a proper tune performed. I also added variable power. It cost me about $100 for the work and shipping. It was well worth it. It has better SSB audio than my $450 Galaxy export. Its just something to think about. If you want echo, buy an echo board for $25 and install it. Most of the export that are in the $200-$250 range tend to be the non SSB models. There are only a few SSB exports that I've seen in that $$ range. And the power on those models aren't much higher than a tuned CB.