I have had this setup for about 5 years now. I drink more coffee than ever, spend much less for it and it's at the point where I would much rather drink my coffee than go out to a cafe.
But yeah, I would love a La Marzocco. When and if my faithful Silvia kicks the bucket I am going to definitely head that route.
You should try it! There is something just so satisfying about making yourself an awesome cappuccino and it's great for guests.