I would not buy a drysuit unless it was goretex. The first dry top and pants I bought were not goretex and I did not wear them very much because they were so hot. The goretex you can wear more because they are not so hot and breathe. The latex seals on all suits need care and do not like the sun. If you are just planning on using the drysuit a couple of times a year get the cheaper one.

"I have been told to stay away from the Gortex due to the fact that it degrades over time"

I tend to agree with that statement. Many of the hardcore paddlers are going with the multi-ply breathable nylon suits because they seem to hold up to the punishment better than the Gortex. There have been some improvements over the past few years with these laminated fabrics.
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Goretex is probably okay in fresh water. If it's used in salt water the salt will slowly wear the fabric and at about three years you'll experience a total drysuit failure.

I bought my first goretex Kokatat Drysuit in 1994 and used it in salt water until 2004, rinsing it off with fresh water after each use. I did have to replace the zipper twice by sending it to Kokatat for repair. The second time one of their repair people cut through the zipper and into the back of the suit. Kokatat sent me a brand new suit, relief zipper and gortex booties included. IMHO Kokatat rules. Get the goretex booties and relief zipper.

I have used my Kokatat for many years and in 2 Worrell's sometimes wearing the suit for 16 hours at a time. I have rinsed the suit off with fresh water put 303 on the seals kept the suit in my closet when not in use. I have never had a leak or had to repair anything. If you don't take care of your equipment it will not take care of you.