Well, I guess I will be the first to disparage the 2340 in this thread. I bought one back in Oct. 99 as my first pistol. I was pleased with it to start, until I had a few FTF's and a couple of jams that didn't instill any confidence in it. Also, this was my carry piece, and I found it to be a little too heavy for CCW for me. A week ago, I took it to my local dealer and traded it in for a new G23, and I haven't regretted it a bit.
But, to address your ?'s more directly, if you want a Sig, and are looking at a .40, I would recommend the P239. Either way ya go, I would stick with the P series Sig line. And as far as the price, seems like a fair one. I paid about the same for mine.
Good luck on choosing a pistol, I wish you the best.