After selling my Bigmos on ebay, btw I probably wont ever do again. The fees are insane, selling price 793.00 23.00 to paypal and a whopping 76.00ish for ebay. No more for me. But anyways....
I was looking for better IQ, the Sigma just wasn't doing it for me. Then realizing the 100-400L was a tad out of reach budget wise as well the 400 5.6l. I decided to upgrade my nifty 250 with the 70-200 f4 L. Brand spanking new from BandH 559.00 not bad I think considering most of the same used on ebay were around the same price. We're talking new and not the grey market stuff either. They have a 80buck instate rebate til the 5th on Jan.
I also grabbed a Hoya CP filter.