Since starting this thread, I've purchased Welcome, Abraxis and Blues for Salvador - they were all on sale for $9 canadian. (Santana 3 wasn't available.) Of these, I most enjoyed Blues for Salvador. It's exactly what I wanted at this time --- great featured playing by Santana and high energy (especially the title cut). Of course, the other two cds are also very enjoyable. I look forward to Santana 3 when I can find it.
Thanks to all for your suggestions.
John