HB wrote:Besides, if I had brought in a humongous grinder like the Mazzer Major into our kitchen and plunked it down next to a small espresso machine like my old Silvia, I would have developed heatstroke under my wife's glare. If one wishes to retain some level of marital bliss, one must move slowly...

I'm a newbie as well (received my Gaggia Carezza as a Christmas Gift from my in-laws), but I've completely lucked out with my understanding husband. He's become a total enabler of my new espresso obsession, despite the fact that he himself doesn't drink coffee of any kind. I posted before about the Espro Toroid pitcher and custom engraved Reg Barber tamper he surprised me with. Well, this past Tuesday he surprised me with an early Valentines gift - a new shiny Macap M4 stepless grinder. I wanted to kiss him (eeeeeeek, great grinder!!!) and strangle him (he spent that much???) at the same time.
More in tune with the main topic of this thread, I'd like to compare what I've been able to achieve so far before, and after, the grinder upgrade. I started with a Capresso Infinity, which I think suffers from a similar problem as the OP's grinder. The grind is decently consistent, but the spacing between settings can be limiting. However, by varying my dose a bit I was able to land shots within the acceptable window, and the results were shots balanced between sour and bitter, but without much sweetness or chocolate/caramel flavors. I was happy - nearly all my shots made for a great (aka better than what the local coffee shops call a) latte. However, I knew that somewhere down the line I would like a new grinder. As another Gaggia owner, I can't stress enough how important it is to 1) let it heat up for sufficient time, and 2) do a cooling flush (or even two or three rounds of flush/wait if you have the time).
Enter hubby, and his tendency to spoil me (sometimes a wee bit too much). I powered up the Macap M4 and, before even pulling a shot, was surprised by how quiet it is. I used ~1.5 numbers above the zero point as a my starting point and started to dial in the grind. My first shot was fast, and as I dialed in the grind a little finer with each shot, I could definitely see and taste the improvements. And then, my God shot. My attempt to repeat it hasn't happened yet (as they say...user end of the handle), but I managed to get everything right (definitely with the aid of the better grinder), and that shot tasted like chocolate caramel syrup. After a few sips of it straight I decided I wanted to see how the improvements tasted in milk, so I made a cappuccino. Pure chocolate-tinged bliss. The memory of that shot has become all the motivation I need to keep practicing.
So, OP, my suggestion is just to keep on plugging with the equipment you have until YOU are satisfied that it's time and possible for something better. They say it's easier to learn to create great art if you have the best brushes, and I don't doubt it. Because with a great brush, you're guaranteed the right response when YOU do something the right way. But no brush can teach you that technique, and without technique a good brush paints like any other. So, we start with entry level equipment, and we get frustrated when our beginner level techniques are crossed with difficult to use gear. However, no matter what the gear is, on average our results will improve as our technique gets better, and we learn the hard way about the variables at play. Eventually, the machine becomes the limiting factor, as our technique has improved when the machine has not, and THAT is when we NEED (well, it could still be called want, but I'll go with need) the better equipment. I lucked out and hubby moved up the upgrade time table, but I could very well have gone along with my so-so grinder very happily until I was more confident in my own skills. I know I've yet to master consistency in my technique, which means I'll probably waste plenty of coffee adjusting my grind when it's *me* that needs adjusting!
Also, another poster here pointed out to me that as long as *you* are happy with the shots, that's all that really matters.