Over the years, I have thrown on several different wheels, including Randall motorized kicks, Amaco motorized kicks, Brent B, C, CX, CXC, CI HP, CI MP, Bailey ST and STX. All of these have been great wheels even though the throwing experience on each of them was different.
The Randalls were with the bat cups and plaster bats. Great for casseroles and other things up to 15# for me. However, I often would watch the professor throw 25+# for his large pieces. The motors on these were pretty good, with a puck that hit the side of the wheel, unlike the Amacos I threw on later that had the puck hit the bottom of the wheel. The Amacos were great, even though they took up a lot of floor real estate.
All of the other wheels either used belts, or were direct drive as the CX by Brent. The CX was really quite nice for throwing all sizes of pieces even though at times it might balk at start and stop. It may have just been a quirk of the wheel. I had a problem with the B and the MP as both of them seemed to be underpowered when it came to centering 25# or more of clay. I would throw on the MP when in the HS studio, to check out the wheels, and found that it would stop with larger amounts and my centering style. All of the other belt wheels were fine with me, as I could control quite a bit of clay, throw slow when needed, and not get any shudder when dropping down to way slow.
Buying a wheel when a beginner is tough because you really don't know what you need. Later you know what you need, but really need to try out different wheels to see what you like and what you want. Just because someone says a Stuart, or a Brent, or a Speedball, or other is what they like, we all throw differently. Best to get to a place that has wheels that you can try out a bit, either Ceramics shop, local pot shop, conference or such. If you are just starting out, and find a used deal. Look carefully to see if it is smooth running, that the wheel head has no play in it, that the controller moves freely, and that there are no frayed/damaged cords or plugs on it. If this wheel is a kick wheel check to see that the wheel turns freely without any noises-noise could mean bad bearings which usually take an arm and a leg to replace.