I recently purchased the Seasucker Monkey Bars cross bar set for my i3S in order to carry a canoe. While the weather has been too iffy recently to try this out, I wanted to mention that the Seasucker is extremely well made and confidence inspiring. It is also made in the US. The cross bars are quite stout and unscrew in the middle for easy storage in a smallish box. In looking the set over my only complaint is that the company does not seem to offer a set of cleats for these bar to keep the canoe from shifting from side to side. The bars are 33mm and thus Yakima bars (for which such cleats are available), will only only fit wound with a number of layers of rubber tape at the points which the mounts clamp onto the bars.
I don't know about carrying a bike or a basket on the set up but for a canoe or kayak which would be tied down to the car via the undercarriage at front and rear these bars seem pretty safe. Also good for carrying lumber. The suction cups will adjust to go on the outer portions of the roof where there is support from the pillars.
I will report later how this all works out for shortish trips with my 36 lb 16 foot canoe in a few weeks.