My only suggestion after spending several years in Sports retail is go direct through a manufacturer, avoid the retail side.
Depending on price point, there are options:
http://kobesportswear.com/
https://www.athleticknit.com/
http://www.k1hockey.com/
http://www.ccmcustomjerseys.com/
I'd also figure out the team plans. Is this a group of guys that will stay together, as a team for years to come, or do you expect to have a lot of turnover, with guys leaving and new guys joining. This will play a big role in deciding the style you go with.
If you feel like there will be a lot of turnover, I'd suggest going with a cheaper model jersey, with no re-order restrictions. If you plan on staying together for a while, go all out, and do a custom sublimation with personalizations and all the bells and whistles.