jamiedolan wrote:Are there any other machines in the sub $500 range that have a non-pressurized portafilter that I might be happy with?
Yes. definitely.
Two brands to look at are Le'Lit and Gaggia. Both have quality components very close to that of the Silvia. I've never used Rancilio's machine, but I personally believe that it is over priced right now.
The Le'Lits, Gaggias, and Rancilio Silvia make up the solid entry level to great espresso. All of them are capable of really good espresso and reasonable steaming, but all of them require you to learn individual routines and quirks. The choice between them can be whittled down to specific features. Do you care if you have an aluminum boiler? Want a 3-way solenoid valve? Adjustable OPV? Button layouts, ergonomics, visual appeal, case material?
These features will guide your preference. Last I checked, almost all use the same Ulka pump. You'd be hard pressed to call any of them thermally stable, so I'm not sure if the small variances in boiler size affect quality in the cup hugely. I'm not trying to say that the Silvia isn't a great machine - it's market presence, resale value, and longevity speak highly - but don't think it's the only one.
jamiedolan wrote:Will I be wasting my money buying something other than the silvia just to save a couple hundred bucks?
I bought a refurbished Le'Lit PL041 for under $300, and I've never been disappointed with my decision. Shop around... your best value is always changing. Don't be afraid to buy used either.