JoesCup wrote:Should I splurge on a big e61 machine? or get an SL-70?
To some extent, allow me to echo Michael's thoughts. I gather from your first post that you have a Gaggia espresso machine. The Solis is the same class of espresso machine (single boiler, dual temperature), and is more of a lateral move than a major upgrade. Based only on the info in this thread, I would not recommend it for you.
Since you enjoy milk-based espresso drinks (cappuccinos, lattes, mochas), you will probably be happier with a heat exchanger, which allows you to brew and steam without waiting for a boiler to change temperature. HX machines start at ~$750; the more forgiving E61 brew group brings the price up to ~$1000.
More importantly, good espresso depends more on the grinder than the espresso machine. Without a decent grinder, an espresso machine upgrade will yield minimal benefits. Be prepared to invest at least $150-$200 for a good grinder ($400 gets you into really good grinders).
For better or worse, espresso makes greater demands on the equipment than any other coffee brewing method. This is reflected in the equipment cost. Only you can decide whether this kind of investment is worthwhile. If you need help justifying the cost, many of the site members are world-class rationalizers ("wow, I saved over $1000 at *$ in the first six months alone!").
Excellent low-priced brewing alternatives include French press and Aeropress (but these do not make espresso). And regardless of the brewing method, you will need a good grinder!
Good luck with your choice.
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John