[mad=dog]

I have always liked the Claw. It's cursed alright, but it does wonders to most saving throws and gives a +1 AC bonus. The helm of Balduran is easily replaced with one of many helms in the game, whereas the unique properties of the Claw allows you to wear a certain cloak while retaining most of the benefits from a Cloak of Displacement. I have found the Claw, but I presumed it was either coincidental or class related. It did not strike me to open BG1 and compare the characters.
My shortlist was merely equipment that I recon it will take a long time to replace. I have not tried to acquire the scimitars in BG2, but someone whispered that they will be replaced with inferior models (+2) if you try. I find it remarkable that you can get better scimitars in BG1 than in BG2.
Kiels buckler is nice with an elven thief in BG1, especially with a one handed missile weapon. I find the +1 buckler in BG2 a suitable replacement until UAI allows all shields to be used. Since you can waltz straight in and grab it in Athkatla I don't regard it as irreplacable.
One other thing though - it is also impossible to get the original sword of balduran (longsword +1, +4 vs lycanthropes) if I am not mistaken. It would be nice to have against certain greater werethingies.

Would you be able to import-drop a scroll of dimension door? A spell I sorely miss.