Well, as you can see, it’s not a question with a simple answer.
I bought my Lenz System 100 a bit over 4 years ago. At the time, it had capacities and capabilities that other systems did not. It is a 5-amp system right out ouf the box, while many others were only 2.5 amp. It supported 13 functions, which was state-of-the art in 2005. And, with my big fingers and aging eyeballs, the large, friendly buttons on the throttle made me more comfortable than the little cell-phone buttons on all the others.
I have been completely happy with this system, and have no plans for upgrades. For my layout, 5 amps is plenty. I picked up an extra “engineer’s” throttle, because I thought I might like the large analog throttle control dial, but as it turns out I never use it. In fact, if I ever get around to multi-operator action on my layout, I’ll probably pick up another “dispatcher’s” throttle rather than saddle anyone else with the low-end one.
The higher functions now available don’t interest me, to tell the truth. I have sound engines, and I enjoy them, but I don’t need the “station announcements” or “mooing cows” or whatever else comes out of those speakers when you get to the point where they ran out of meaningful engine noises.
However, much has changed in 4 years. While Lenz was on the cutting edge back then, they really haven’t released anything new, other than some very high-end block signalling stuff I’m not interested in. Other manufacturers have added radio throttles and whole new systems. I expect this to continue.
My advice, then is to buy a basic system, but one that’s already expandable. If you plan to operate with radio throttles, it might be a good idea to get that now, although a control bus for tethered throttles isn’t that big a deal to add.