Like others, I have only had hydraulic jacks, and have been very happy with them. I have had friends who had electric jacks and had a number of problems with theirs. Unfortunately I don't know what brand jack they were.
Regarding radiators, I would definitely prefer a side radiator. I have had 3 motorhomes with side radiators and have been very happy with them. Having said that, I now have a motorhome with a rear radiator. My personal problem with side radiators is that the price of the motorhomes with side radiators keeps going up and up, until it is higher than I want to pay. This is my second rear radiator motorhome (my first diesel was also a rear radiator) and I have not had any problems with them either. Some think the side radiators cool better, I have seen no personal evidence of that. The biggest issues from my standpoint is that the side radiator gives you much better access to the engine to work on.
Ed Headington
2013 Newmar Ventana LE
2013 Nissan Versa toad