I've been looking all over for the recent recordings of the DQ Symphonic Suites. They're the ones that were performed by the Tokyo Philharmonic, with the fancy cover artwork. Here's an example:

http://www.rpgfan.com/soundtracks/dq1/index.php

Aside from my personal preference for the "sound" of these versions, they also have new suites/content that weren't in previous printings. (For example, the Psaro theme from the DS/PSone versions of DQIV.) I already have Dragon Quest II, III, and VIII, so I'm just looking for I, IV, V, VI, and VII.