Here is Yfull's  Haplogroup I tree http://www.yfull.com/tree/I/ . I myself couldn't recommend any single snps. That would be best answered by an I2 admin. On Sunday, June 29, 2014 11:11 AM, Andrii Lundiak <landike@gmail.com> wrote: Hi Carl, I recently subscribed to Y-DNA-HAPLOGROUP-I@rootsweb.com and now I see you posted an update in yfull. My questions is - Is there any link/resource about recent changes in yfull regarding I2a1 aka I-P37 ? Or any changes regarding I2a branch and subclades? I just have recently received my Y-DNA-37 results from FTDNA, and I'm I-P37, but I'm stuck on what next SNPs to choose/order. There is S17250 and few others, but still I'm not sure about current haplo-tree and what markers to order. Thanks in advance, Andrii Lundiak Ukraine