Hi Smokie & welcome
I was looking at radar a few months ago and its till on the books one I get all the other bits sorted out. (spent too much on other goodies
The only real concern I have with radar is I dont like the idea of transmitting 1.5Kw or more 4 foot from my head
When i get round to fitting radar it will be on a mount about 3 foot above the A frame, this keeps it away from me and others and gives you greater range, which even at this height will be very short.
Go for a radar, their uses are limited on a rib, but when you need one you will be glad to nave one.