For a seperate throttle stick combo most people would say go with CHproducts or Saitek X45.. I think thrustmaster may make something too (not thinking of the cougar) but I don't have any experience with them.
Saitek was really good to me, I bought a refurb X36 and it lasted me 3+ years no problem. However there are many people out there who have had hat switchs and such go bad after only a few months, a problem seems to exsist in their quality control.
CHproducts is a bigger investment, but I think you'll be hard pressed to find anyone who has anything bad to say about them. I bought myself some CH gear about a year ago and I'm loving it.
In the single piece/combined joystick throttled I think the Microsoft sidewinder series has the best rep if you can find one. Saitek cyborg is popular as well. You can also look in thrustmaster though as I said I don't have any experience with them. Steer clear of Logitech. Many people have had bad experiences with Logitech, myself included.