the downside of tiller handling:
- no console
- no seating
- no place to put the gas tank, the battery, the VHF, the fishfinder, the antenna, the lights, etc.)
- no stand-up driving
- more control at slow speed (that's the reason why I do have a tiller handle rib, for trolling fishing)
- lighter (not as much equipment as in a console rib).
- might give you a tad more floor space.
I ended up adding a console on my tiller rib (an aluminum box use for pick-up truck, purchased at home depot).
Remember that while handling the boat seated on the tube, you can get ejected very easily if the waves are more than 30-50cm at speed of 18-20 knots. I have to get on the knee on the bottom of the boat. I don't feel like I will be able to still do that in a couple of years! It make me feel like I should have invested a bit more money to get a console every time it happens!
For the sight, the people that are onboard with you will most likely be your problem. If you're alone, you will have no problems seeing in front.
Hope it shade some lights on the subject!