Realistically, your only option is to go up to HX if you want more steam power. You will have the same problem with 6910 and Silvia.
Have you done the silvia steam wand mod to your classic?
Quite simply, you are way better off spending your money on a new grinder. I went from a 0480 to a mazzer mini and the difference is phenomenal. The Classic really is an awesome awesome machine. It may not have the complexity of flavour coming out of a Synesso, it may not have as much steam power as a 15L boiler, but it does a damn good job.
The process of steaming more than 2 milk-based drinks isnt all that complicated. You have numerous options:
- brew 2 espressos
-steam milk for 2 espressos
- go one by one
The key is to turn the steam switch off as soon as you have finished texturising the milk. Then refill the boiler by hitting the brew button (a whole lot of steam will come out of the group head). Then, bleed the steam wand, hit the steam button, wait 20 seconds, and BOOM - you are back in business.
If I had a latte-art comp with HX users I doubt I would be too far behind. Unless you are pumping out 4+ coffees at any one time (in which case its time for $2000+ HX), have faith in the magic that is the Classic!