I think the CH Fighterstick is worth a mention too - look around online for a good used one if $ is a factor.
I have a large hotas collection and many years of playing online/offline with them.
I have 6 Virpil sticks, 8 grips, 4 of their throttles, their collective heli units, 5 different custom rudder pedals, 2 VKB Gfighters, 4 TM Wartogs, 2 Cougars, and a pile (a collection of Hotas since 1998 and before) of other Hotas, 20 stick/rudder combos of Saitek and the like.
Every Stick/Hotas/Rudder combo has it's pros and cons. Budget is extremely important regarding the OPs question IMO. I've picked up NiB CH Fighterstick and throttle combos online here in Canada for very little $ - like $30 USD for both (I can post pics of all of this stuff..again). Something along these lines is what I'd recommend, again, if cost/price is a large factor. If it isn't, as Mayhem recommended, Virpil or VKB are the best options at the moment.
Regarding TM Warthogs. It's a great HOTAS, but eventually, the stick will get the "sticktion" issue, and will require you to take it apart, replace the ring, completely clean it, re grease it properly, and then reassemble. Of the 4 TM WH sticks I have, 3 have had this happen in varying degrees of time and use. Also, their customer service is in France, and in my experience, a GIANT PITA. That said, many love the TM WH, and it isn't a "bad" choice, but for the price now...go with VKB's Gunfighter, or Vipil's 2 options, depending if you want to play on the desktop or off of a desk clamp setup.
You also have to consider your throttle and pedals setups, or at least the stick you want's ability to control these axis.