Best Printers For Invitation Business What's The Best Type Of HP Printer For Home-based Graphic Design Business?

What's the best type of HP printer for home-based graphic design business? - best printers for invitation business

I started building my own graphic design business and recently bought an HP Officejet Pro L7780 and found it difficult to fulfill my duty.
1. Wireless - I have to back every two weeks. WHY?
2. Without Frontiers - spent my layout when I ask him to print borderless. WHY?
3. It tarnished my impression when I print the brochure (3-times, the loss of my ink)
Now that I bought the HP printer line in 3 months and do not know if HP repay the money, which probably make an exchange. Suggestions on my next printer? Laser? Inkjet? Which model is best? I brochures, postcards, brochures and invitations.