Thanks for your inquire.
The Rotors I selected were from HobbyKing 3.
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=42405" duct fan
I had been looking at buying brass props until I found these but I still think the brass props may be the way to go although it will be more expensive. Props I was looking are similar to these: http://www.hobbyking.com/hobbyking/store/__18245__32mm_3_Blade_EP_CNC_Boat_Prop_P1_7_D1_8x3_.html
As for the wires going through the hull I am still thinking about this. I have been looking at SeaCon Connectors but these are proving to be to expensive:
1 MC-BH-8-M-S/S, 1ft 20 AWG (std) leads 1-5 102.66 Regular soldering 3 weeks ARO to ship.
2 MC-BH-8-M-S/S, 1ft 18 AWG leads 1-5 123.20 3 weeks ARO to ship
3 Nut and washer in S/S Any 2.00 Stock avail
4 MC-IL-8-F, 2ft 20/8 cab 1-5 63.71 Stock avail
6 MC-DLS-F Locking Sleeve any 7.00 Stock Avail
So I am now thinking of making my own connector for the Motors/Lights/Gripper by passing all the wires through some sort of tube connector that I can epoxy all the wires in much the same as the OpenROV. The Tether I may just go with a Secon Connector because they are so nice and detachable. Was thinking of a 4 pin connector.