Agreed man.
Please do not go for a 10 quid wetsuit from a bucket and spade shop, they can actually be very dangerous. SERIOUSLY!
Look on ebay if you are not from the coast and you know what you want. I am lucky as I was given a great suit so I never looked, if possible get in touch with a local surf center by email.
Every surf school / shop I have ever mailed down south are great for sales and advice.
Most people here also give superb advice but you did give very little info on what your plans for this suit are?