Whats a good pump? For Wand watering

I have tried a few pumps, mostly sump pumps i need a pump that gives me awesome pressure to my watering wand all i ever get it is a weak flow. I have tried a shurflo delivery pump i think its 3gpm and even that is just okay i have to let it build pressure then stop spraying then let it build then stop. ( its WAY better then the sump pumps i have tried, but i would like the kind of pressure you get when you turn on your garden hose)

Modni pump are ok and cheap but they will leave an inch of water on the bottom. Really nice ones are Leader EcoSub I can't post links for one more day so you'll have to look them up.
The main issue with pumps is the salts eat away at the seals.

I finally stopped getting cheaper ones and got a Danner 700 for my hose/pump rig. Works like a charm. 500 might cut it if you need a few bucks cheaper but I'd get more gph than you think you need - you can always restrict the hose/etc.