I agree with the comments here: Amazing build quality with ultra smooth and reliable nibs. The base construction is brass so as previously indicated, it is a heavy pen. As Jar mentioned, there are a few reviews on the forums.
I have quite number of Duponts, all in the Olympio line, Large and Extra Large and I can share my personal findings. The nibs are fairly stiff but the Limited Editions seems to have a little more flex. I agree with John Cullen, that the older nibs with the script "D" were a little smoother, particularly for the XF nibs. Currently they have stopped making stub nibs and obliques and the Limited Editions nibs are only available in F, M, B. The customer service now is pretty good but if you need to switch out LE nibs there could be a long wait. They have excellent communication though so you will know exactly what to expect.
The Extra Large and Large might not look very different in size but they are definitely different when you write with them. The both have great balance and can be used posted or unposted. My personal preference is for the Extra Large un-posted. Posting will not damage the finish on the pens.
The metal pens are very beautiful and my favorite pen is probably my Pharaoh but I think were Dupont really excels is with their Lacquer finishes, they are rich, lustrous and very durable.
Finally, BEWARE OF FAKES. They are everywhere, especially with the Olympio line and some are very good. Buy from authorized dealers or do your due diligence.
Edit: P.S. Just saw your post that you are buying from Bryant. No need to worry about fakes then. I bought my Shaman from Bryant and it is an amazing pen.
Edited by Shalori, 23 March 2011 - 21:26.