Another option if you want a custom length cable is ABR Industries. Yes they will cost a little more but they are excellent cables. You won't go wrong with cables from ABR Ind., Messi and Paoloni, Times Microwave, or DX Engineering. Another good source that I have only used for short jumpers is the Jet brand from R&L Electronics.
You will be fine as long as you stick with LMR400 or a quality equivalent. Avoid the cheap stuff from Amazon and eBay.
The Comet CA-712EFC is a very popular antenna that works well. It is long at around 10 ft. The Comet CA-GMRS is another good antenna if you need something shorter. There are other brands that will be suggested.