Also have a look at this:http://store.magicseaweed.com/blog/category/wetsuits/msw-wetsuit-guide/
Great wetsuit guides from MSW. Especially have a look at "price is your guide" one (and all the other ones!). Because it is VERY true. The more you pay, the better the quality of the product, and this makes your surfing time ALOT more pleasant.
Also another big factor is flexibility! Low end wetsuit feels like (no, it is actually!) your movements are being restricted. For example, shoulder area needs to be super flexible or otherwise it is just as same as you are out there in the water with 5kg wrist weight...
PRICE IS YOUR GUIDE. Unfortunately. Try several wetsuit in shops (if you can) and if you have time, look for a last season bargain. They come down quite a lot.
Also second-hand wetsuits (the ones never been worn) and children's wetsuit swap in the "For Sale" section of this forum are equally a useful source!