Just what it says in the title. Which one and why?
And if anyone says I should by the $400 Warthog, consider this your one warning that I will flag you for it.
In my personal experience....
The Warthog stick is nice, the button layout is excellent for ED. The base (gimbal, specifically) is the weak link, not being a particularly great design (same as the T16000M, in fact), and also being plastic mated to metal (potential point of failure). TM also seem to have dropped the ball a touch, using a lesser quality lubricant than they used to, meaning the older Warthogs have a nice, smooth motion, the newer ones having a fair bit of "stiction", need an open, clean and re-lube to make nice and smooth.
As for the throttle, it's not great for ED. Lots of "flick" switches that hold in place, which not a lot of bindings on ED have an option for, and no real analog style stick like you see in the TWCS or CH Pro throttles. It has a fantastic feel, but poor button layout (for ED).
the T16000M is actually a great stick, with a totally botched button layout for a HOTAS. It has 12 wasted buttons on the base. At least 4 of those should have been turned into another hat on top of the stick, but instead, TM decided to change the LED colours to orange from green. Shame, for the money, it's a super accurate stick, but lacking in bindings where you need them.
I know this isn't what you want to hear, but my ideal set up, today, with stuff you can buy right now, is a CH Pro throttle (TWCS throttle probably as good, but I have not tried one yet), with a Virpil Mongoos T50 base, and a Warthog grip, throw in a set VKB T-rudder MK III or IV pedals, and you're set.
On a side note, Virpil are set to release a "budget" grip aimed at space sims, and a "budget" base. I'd say it may be worth waiting for.
The new Virpil base (WarBRD)
And the grip (Constellation)
As for the X-52... It's actually an amazing looking stick, totally botched by Madcatz and poor QC, Logitech seem not to have done much to resolve it. I'd stay away...
Z...
