The answers posted above should give you much to think about. The Breville uses a "pressure portafilter," i.e. a restricted flow portafilter that is intended to make up for poor grinding. No basket or machine can really do that, it just gives the operator the false satisfaction that he's dong something right. The machine itself is probably fine otherwise. It receives relatively good reviews, whereby I must admit I have never seen one in person.
That said, it is more important to consider a good grinder. A great barista with the best beans and best espresso machine cannot pull a good shot if he has a mediocre grinder to work with. It can't be said that the grinder is more important than anything else, because a great grinder cannot make bad beans taste good, or correct for poor distribution and tamping, or wrong water temperature, but it certainly can be said that without a good grinder none of the other things will make a good espresso.
Don't chose a grinder because it looks great or matches the machine well. Grinders made for home use, even very expensive ones, are not very good. If you want to get good results without a long path of upgrading watch e-bay for a used commercial grinder. They often turn up at a price equivalent to a new "home" grinder and the results will be much more rewarding. Even if you have to replace the burrs (a good idea anyway) you will save money in the end and eliminate a great deal of frustration. I have 5 commercial grinders that all work perfectly, are relatively easy to adjust and I didn't pay more than 100 GBP for any of them. Mazzer, Rossi, LaCimbali, Rancilio, etc. are all good any many rebadged examples are found as well. If you unsure you can always ask here. Someone will have had experience and can share it with you.
Good luck on your coffee trek and please let us know how you do or ask more questions here. We love to spend your money.