For now, I use a Pioneer 656 for my SACD's and it was a very good start with that new medium.
It's not bad, received good tests and is capable of revealing the superior quality of SACD's compared to CD's. The most recent successor seems to be the 696, which possibly will sound better.
However, these are basically DVD players and in the lower price segment you will find the most SACD players in this group. There is a technical compromise between video and audio processing and a DVD will try to produce good pictures at first.
During the last weeks I checked-out for a new "pure" CD/SACD-player and if you gave me 500 EURO I would immediately walk to my store and buy a Marantz 7001. All tests and recommendations lead into that direction.
As an alternative there is the new Pioneer D6-J. Interestingly both players are for STEREO only. There is a rollback to the pure stereo equipment and I am sure, that both players will give you very good Mahler in stereo (in the test they mentioned the very good headphone support of the 7001).
I also consider to get a new amplifier, but this is even more difficult. The guy at the store - I trust him - recommended the Denon 1500 AE combination with amplifier and SACD-player - 1500 EURO...
If anybody has another recommendation for CD/SACD-players below 400 EURO/USD - very appreciated.
Michael