In reply to Baron Weasel:
So, as others have said, swimming wetsuits are very different from wetsuits that can be used for going down canyons and other stuff that might involve friction. They are designed to be super smooth for water resistance and that makes them very delicate. I have gone through a couple that ripped just through not being too careful with fingernails when putting them on.
150 is a really low budget for swimming wetsuit. You are unlikely to get a very stretchy and very comfortable model, but you are likely to get one that floats really well since cheap models are often designed for relative beginners that can really benefit from having the legs lifted.
You really need to try them on, some triathlon shops put on events sponsored by brands to try out different models in the pool. For my body, Orca suits work really well, but the zone3 model I tried caused a big rash on my neck. For other people, it's the other way around, so highly individual.
If you can live with someone having peed in your wetsuit before you, there is also a decent second-hand market
Post edited at 14:30