LMR400 is probably the best bet for loss and cost at that length and frequency. One thing I'd do is get a smaller cable, like LMR240, about 1 meter long and use that to attach to the antenna adapter. The other end would go to the larger cable. Trying to use a handheld with a big unruly cable sticking out the back is a pain and puts a good bit of stress on the adapter. 5-10 feet of the smaller cable will not add too much loss to the overall power budget
and will reduce tension on the adapter and connectors.