My experience offshore (at various levels in the food chain) indicates that most SAAB seaeye brushless DC thruster based ROV units are very reliable. It's a case of deciding what best suits your operational budget. Call them up and have a chat, tell them what you want to do with it. That's often the best way to cut down to what you need. Spares and support seem to be pretty good also.
Seaeye Falcon Features:

Seaeye Falcon Features:
- 300 metre depth rating, 14 kilo payload
- Max 450 metre umbilical (1100 metres with F2 Fibre Optic Pack)
- Magnetically coupled brushless DC thrusters with velocity feedback loop
- 4 Vectored and 1 vertical thruster
- 50 kgf thrust with 1:1 power to weight ratio
- Distributed intelligence control system
- Integral system diagnostics
- High resolution colour camera on 180° Tilt Platform
- Variable intensity, 6400 Lumens of LED lighting
- Auto heading, depth, compass and rate gyro
- Portable surface control system with video overlay and daylight readable display
- Low drag umbilical
- Single phase A/C power input - auto selecting universal 100-270 VAC at 2.8 kW
