Been Ltd for a few yrs now - as an IT bod.
'A) better to be VAT registered and go for a fixed rate option.'
Depends. as already mentioned, if most of your clients are VAT registered, be registered (VAT back off PC's, phone bills, tools etc etc). If not, the client has to pay the extra 20%. Fixed rate depends on the in/out VAT ratio. Do yer sums.
I'm sure I can knock you up a website if you have a vague idea of what you want on it! Get yer hosting/email sorted as well. No charge (except costs!)