I've got a Clicgear push trolley. Had it for 5yrs now and it is very easy to push, fits all bags. They are expensive new, around £190 but can get it under £100 if you are willing to wait and go second hand. Folds down nicely and i can get my bag (have to take driver and fairways out) and trolley in the boot of my Clio.
For electric, a good starting point is the GoKart range, i think they look good (they are a bit marmite though) and the customer service is supposed to be second to none. My main issue with electric though is the charging, having to remember to take your battery home with you and put it on charge and then take it with you to the course again.