As far i know, there are only a few options to buy only a throttle:
- CH Products Pro Throttle
- Thrustmaster Warthog throttle
- Thrustmaster TWCS (released Q4 2016).
The first one, CH is Quality. Industrial plastic, High quality pots and the best ergonomy you can buy in the market. It has the better durability of all Throttles. In the other hand...some people said that its design is boring and vintage. It has the smaller travel. The best option if you live in USA in my opinion. I use it and I love it. Also the software, CH manager is very easy to configure.
Warthog throttle has a great design, it's metallic then it's heavy, it has dual throtttle and some switches in the base. But, it's expensive (more expensive than if you buy the whole HOTAS) and the quality is outside, inside is plastic. It's the only throttle in this list which describes an arc
TWCS Throttle is new. It is the cheapest Throttle. Still a mistery. Looks great but...I only heard that is very light so, it need some velcro or other sytem to fix it to the desk. I have the TFRP pedals (with the same rail track system) for example and the plastic feels very cheap. It has some sticks behind the throttle that can be used as rudder.
For sticks...Depends also of the budget...T16000M is a great option, Hall sensors, for the money is a very good option. It has Twist.
. I prefer a CH Fighterstick or a Combatstick, again, if you live in USA...ratio Price vs cost is incredible. It uses high quality pots...Then they can have some peaks if the current provided by the motherboard is not constant but also they can be filtered by software (CH Manager is amazing). CH sticks are softer than Logitech Extreme 3D Pro , some peope like me, love it, others hate it. CH sticks haven't Twist....So a set of pedals are required.
If you want something more heavy and more expensive, get a full Warthog combo. It uses Hall sensors...Great precision, great feeling in your hands. Very Solid. Great design. You should need pedals 'cause Warthog stick hasn't twist.
I replaced my old Logitech Extreme 3D Pro a few months ago with a Fighterstick and...Oh man, it's delightful...Why I didn't replace it before?
Any option should be a great improvement, sure. All sticks have great precision.
Best combinations IMHO:
Cheapest HOTAS: TM T16000M + CH Pro Throttle. (best combo at lower cost). A lot of people use this combo in Space Simulators (Elite Dangerous and Star Citizen).
Best Quality Combo: CH Fighterstick + CH Pro Throttle (its hard to find it outside USA).
Best combo: TM Warthog (No budgetary constraints).