Spose it depends how big you want to take your business
if you want to limit yourself to turning over 80k then dont register
if you want to build infinetly then take the hit, and have all the hassles of employing and going ltd etc
Thats how it works for anything in life, if you want something theres always obstacles to overcome, just like starting out self employed, if you want to get out of that 9-5 job you have to sacrifice a lot to get where you want to go.
If you dont register for VAT then remember your maximum income can only ever be the VAT limit, if you go through the VAT threshold your income is only limited by your imagination. Up to you if the sacrifice is worth it on a personal level.