You don't need a commercial one 3000-4000 psi is overkill. That one I posted is that range $500.00 and will do fine and it has a honda motor. Has an awesome warranty... I didn't buy mine at a department store. I went to an equipment place I bought my chainsaw from where they fix them,and asked questions. I like dealing with the small equipment guys as you can take them back if you have any issues. I bought mine down here in Mill bay on South island. There are lots of paces all around the island/mainland with similar businesses
http://www.millbaypower.ca/