Get some of the IGO series. IGO-L for single coils, IGO-W for dual coils, IGO-W3 or IGO-M for quads. All-and-all it'll cost you less than an authentic, and only a 'lil more than a non-FT clone of a popular dripper if you get good prices. Also, I very much vouch the person that said no to the trident... Got a clone in as a trade, the posts spin when tightening down (prolly just a clone problem) but even not counting that it took me a good 5-10 minutes just to trap some dual twisted 28g leads under the positive post -_- They love to pop out of that little slot while you're trying to work that tiny cover on without messing up your coils/leads/etc.
I generally don't like attys that can be built single OR dual OR etc, simply because it seems like something built solely for single or solely for dual (etc) performs better than something built for general purpose. "Jack of all trades, master of none". That being said, there are definitely better ones out there than the IGO's... Just these will let you get a feel of what coil setup YOU like best then find a better atty made for that setup and buy that (or a clone of that

)