Greatest Sibelius

For lifetime achievement with the music of Sibelius there is only one contender and that is Paavo Berglund. Second place goes to Thomas Beecham. Colin Davis would feature high, but what I have heard I don't rate his Sibelius that high, although his live Third is the performance of a lifetime (a concert performance with the Sibelius Academy orchestra, commercially non-available, but what a performance!) 

I once heard Segerstam conduct nos 5 to 7 in one concert, and it was a really great concert. The controversial mr. Hurwitz recommended the Segerstam/Helsinki Phil cycle, and it is sonically stupendous, and the orchestra really surpasses themselves. They play like possessed. So, for a overall cycle the Berglund/Bournemouth but for personal involvement Segerstam is a strong contender and totally opposite of Berglund. Berglund has a classicist view, somewhat austere while Segerstam is certainly a romantic. 

On CD I have the complete sets of Maazel/WPO, N. Järvi (DG set), Berglund (Bournemouth SO) and Colin Davis/BSO. On LP I have Berglund (Helsinki Philharmonic) and Anthony Collins. In addition I have of course the classic recordings of Kajanus, Koussevitzky and Beecham plus many others, e.g. by Barbirolli and Szell. 

For greatest recordings I endorse: 1st Maazel 2nd Szell or Barbirolli, 3rd Davis (an unofficial live release with Sibelius Academy Symphony Orchestra) or Kajanus, 4th Beecham or Ansermet, 5th Berglund/Segerstam 6th Beecham or Berglund, 7th Barbirolli (live HPO)/Mravinsky/Segerstam.

What about cycles, then? I endorse Maazel, the earlier Neeme Järvi on BIS, both Berglund sets (the one with the Chamber Orchestra of Europe is one of its kind), Alexander Gibson and Leonard Bernstein's earlier cycle with the New York Phiharmonic. The symphonies 4-7 by Herbert von Karajan focus on beautiful string sound but are not my cup of tea.