I agree with John, I do a few very small jobs with an old numatic and when I first joined this board planned to buy a machine one step up, like a puzzi.
However the more I read I realise It's not as simple as getting a crappy machine, Posting some leaflets and making shed loads.
I still don't plan to go in and run with the big boys, My budget and experience won't allow that but in my opinion, for what it's worth, The machine of choice for a newbie like me is the grace 5020, Everyone who's used it gives it great reviews and for the price it is the best I've found yet.
Basically the more you spend the better machine you will get, hence better results.
Heres a link for the grace
http://www.btowstore.com/epages/Store.sf/?ObjectPath=/Shops/15094/Products/CRAFT02AIt divides into 2, has 2x3 stage vac,130 psi, 3 jet wand and a Free heater too

Apparently an all round great starter machine
Hope this helps
Andy