I would like to add to Mike’s good advice. Peter Biggins has recently become co-administrator of the CARROLL DNA project and is eager to help where needed. His email address is listed at the http://www.familytreedna.com/public/carroll/
Be sure to order your DNA kit through the CARROLL project to get the group discount. Order as many markers as possible for your budget. Our large research group only found the DYS425=0 marker, which has proven invaluable in our research, by ordering the Y-DNA 67 test. I believe 37 markers is the very minimum that one should order.