Last thought for this post: don't let a shop push you into buying what they're trying to sell.
Speaking as a FORMER shop owner, I will tell you that helping people with dry suits is one of the most challenging sales issues I encountered. The problem is that there is no one right answer. There are multiple choices for the buyer to make, and which is the best choice is usually a matter of personal preference. For the first time buyer, he has no experience with dry suits to have any personal preferences. I know the most successful sales people will solve this problem by telling the customer exactly what he "needs", but I could never bring myself to do that. Instead, I always explained the advantages and disadvantages of each of the choices involved. I then got to watch the customer's eyes glaze over and then have him walk away in utter bewilderment and confusion. Some examples:
a. Front entry vs. back entry (Self donning vs. more comfortable and frequently less expensive)
b. Crushed neoprene vs. trilaminate (tougher material with less drag in the water vs. lighter weight out of the water when wet and faster drying)
c. Neoprene neck seal vs. latex seal (longer lasting and with some thermal protection vs. a slightly better water seal)
d. Latex seals vs. silicon seals (more expensive and longer lasting vs. easier to don/doff--mostly with respect to neck seals)
e. Rock boots vs. attached feet (easier to replace when worn vs. more comfortable and "one less thing to have to pack and/or lose").
Personally, I have gone through the following sequence of dry suits: back entry crushed neoprene (DUI CF200/SE), front entry compressed neoprene (Diving Concepts), front entry crushed neoprene (DUI CF200), and front entry trilaminate (DUI Flex Extreme). I had separate rock boots on the 1st & 3rd suits, attached, integrated feet on the 2nd, and now have the TEC turbo soles on my 4th. The 1st and 2nt suits had neoprene neck seals, although the 1st started out with latex and I later changed it. The 3rd has a silicon neck seal, and the 4th has a latex neck seal. I have gone back and forth between latex wrist seals, heavy duty latex wrist seals, and dry gloves--including DC ring gloves, SITech ring gloves, and DUI zip gloves. Currently, I'm using heavy duty latex zip seals. My point in reciting this history is to emphasize that there simply is not a single right answer in these choices. (Unless, of course, you drink the GUE tea.)