One of my best friends (Phil Gons) works at Logos, and with JT's encouragement we've arranged a special discount for B2W ("Between Two Worlds") readers:
Get 25% off any of their 7 base packages by using the coupon code "B2W" during checkout. The offer is valid through August 8, 2008.
I'd strongly recommend Scholar's Gold. See my review of Scholar's Gold (which makes a case for a digital library) as well as my review of PNTC, BECNT, and NIGTC (which makes a case for using commentaries in Libronix followed by a review of these three commentary series).
On a related note, it's good to see that Logos is adding classic Puritan and Reformed works to its library. There's now a wealth of material available for pre-order.
- The Works of John Owen (17 Vols.)
- An Exposition of the Epistle to the Hebrews by John Owen (7 Vols.)
- The Works of Jonathan Edwards (2 Vols.)
- A. A. Hodge Collection (10 Vols.)
- Charles Hodge Commentary Collection (4 Vols.)
- The Practical Works of the Rev. Richard Baxter (23 Vols.)
- The Works of Richard Sibbes (7 Vols.)
- The Works of Thomas Goodwin (12 Vols.)
- B. B. Warfield Collection (20 Vols.)
- Abraham Kuyper Collection (3 Vols.)
- Historical Theology by William Cunningham (2 Vols.)
- Smeaton Theology Collection (3 Vols.)
- James Buchanan Collection (2 Vols.)
I also benefit immensely from having journals in Libronix. I use the Theological Journal Library constantly. Logos is branching out in its journal offerings and now has several other journals available for pre-order.