The 'best' improvement you can make on the Wouxun's 'duck' antenna is adding a 'tail' to it, something like 19 inches of wire as the 'counterpoise'. That's probably the easiest 'cheap-n-dirty' improvement. From there it's a matter of antenna length, more of it, and naturally more inconvenient for a carry around radio. Almost anything is going to be an improvement on the typical 'rubberduck' antenna. As long as it's a 'rubberduck', it doesn't really matter who makes it, it's not ever going to be the 'best' of anything except convenient. If you can connect to an external antenna, fixed or mobile (not walking around) then there will definitely be a noticeable difference! Until you can use a for real 'full sized' antenna, don't expect any great improvement over the supplied antenna. Wish it weren't so, but if wishes were fishes...
- 'Doc