Kammy the problem u have it with the quantity of coffee you make. Th 6910 are a good mahine (when not back for warantee issues) and are capable of making lots of coffee due to twin thermo blocks. I have played with them and I own a proud Silvia owner she is a beauty, but for making lots of coffees in a row she can be slow. But the coffee out of her is amazing!!
Go visit some site sponsors near u and heck them out. But my Silvia & Rocky combo came under ur budget nicely and left room for a good tamper.