Having the right wetsuit for the conditions can really make of break your session. Being too hot or too cold makes it hard to focus on what you are doing and almost inevitably will make you want to cut your water time short.
If you plan to keep riding throughout the winter, then a good wetsuit is something worth investing in. Being cold is no fun at all. This is where all the tech really matters and comes into play. The more you spend, the better the suit will perform. The key factors here are the flexibility of the neoprene, the seam construction, and the lining type and placement.