I'd like to upgrade to the best possible antenna for the Yaesu VX-8DR to maximize its performance. What would you guys say that is? Isn't there a ducky that has a double antenna built in it? Also, I've read somewhere that someone makes a 2000 maH battery for this HT. who makes it and how does it compare in quality & battery life to the Yaesu 1800 maH battery? Thanks.