If you can figure out which one to use its pretty easy to do yourself. I use http://www.americanwx.com/raleighwx/models.html
Go to the operational global models on the right side then find the gfs and pick the run thats the closest to the current time then scroll down tropicalto the tropical plots and use the 850 vort and hit the loop button.
I use crownweather.com. Been watching him for several years and he's pretty good on his long range forecasts. I watch several, including tidbits and form my own opinions. All of these forecasters are several days ahead of tv and radio forecasts.
I found storm2k through tapatalk on my phone and it has some good info. A lot like hardcoreweather.com, but I've seen rob lightbrown(crownweather) and others post on storm2k too. So far I like it and have been checking it. Was good to read during the Tornado Outbreaks, etc. too!