Ïf you are a scalper or a middler, go for Carib or DSI.
Gameday will limit you/kick you out in no time, Mill will put you on phone only and Jamaica will delay your bet confirmation process.
If you want high limits, DSI and Jamaica are your choices.
Gameday has ok limits, but they will drastically reduce them if you happen to be sharp, Carib used to have high limits - unfortunately they are way lower now.
If you want the best bonuses, DSI and Millenium will be your choices.
If you want safety above all, Jamaica is your book... it seems that all the books you mention rank very high safetywise.
If customer service is important for you, Carib is number one followed by Jamaica.
If you want easy payouts, go for any of the books mentioned except Millenium (requires you to call in and tell anything from your name and address to your NETeller email and account ID).