I just converted to 3.5 because I got the PHB and DMG for free, essentially. My FLGS owner is awesome and made some great trades with me because I had stuff he knew he could move very easily. So my entry fee for 3.5 is going to be like 30 bucks, if that...
I haven't seen a lot of conversion issues that need addressing. Just change out the spells and cut DR in half and blammo, problem solved and since I was using the D&D minis ANYWAY, hey ho badda bing badda boom.
I needed to get new books anyway, mine are starting to fall apart at the spine. I am very rough with my books and I just like the look of the new books so much more, they seem sturdier and aren't filled with as many errors as my 1st printings.