What do you want the suit for and how much are you using it?
Tropical, winter lake conditions, trimix?
I have dove multiple types of suits and each is a different animal.
DUI
CNSE- Excellent suit, moderately priced (for DUI), heavy, slow to dry. I would think it is good to teach, occasional dives, and good for wreck and cave. Very comfortable in the water. Well, until I grabbed the neck seal and fixed it underwater and dumped a ton of water on me- still warm.
TLS350- Tri-lam suit, very light, fast drying, great for travel. Downside is potential for holes if used for certain types of diving- can be offset with knee and butt covers. Thermal protection from undergarment only. However, makes diving it in the tropics no big deal.
CF200- The mother of all drysuits. You have to learn to love this beast. But it will last forever- period.
The DUI weight and Trim system is a favorite. Get that weight out of your BC and easier to carry. In fact my weight and trim goes to Mexico in the summer for ocean diving with my backplate and wings. The hoods are excellent for those of use with big heads. The thing with DUI is the cut and fit. Feels like you are wearing coveralls and not a straight jacket.
Diverite has a drysuit that is very interesting- with RF (radio Frequency) seals.
No leaks from the seals. A buddy has one and swears by it.
The Mares suit is a Mobbys suit that has been revamped.
I have not seen it in person, but the price point on one of the suits has been rumored to cheap by others standards.
Another option is Pinnacle. They have some neat products. I haven not dove there drysuit. Hopefully soon.
Alan- EXCELLENT statement...