Well I thought about it and couldnt decide between the Sigma 30 mm and the Pentax 31mm Limited.
Money was the biggest issue for me as I couldnt justify the expense.Then I put the price of the Sigma and added a good ND filter and a circular polariser and the gap in price closed a bit more. I already have a selection of good ND,CP and UV and protection filters in that size from my Sigma 10-30 and FA*80-200.So that was the biggest concern lightened.I nearly got conned by a real cheapie on ebay over the weekend.Luckily ebay pulled it from listing as the seller was a crook.Starting price was $350US and I was the highest bidder befor closing.
I am hoping that Pentax will go full frame in the future so this lens will fit in nicely.Now all can do is wait and see what results I can get with the K5. Also I ordered a new laptop for my wife.So I dont feel so guilty anymore. She doesnt know yet.
John