A blog to find and follow the best in espresso machines.
A good source of information is on a blog at Home Barista.com
A good review site is Coffee Chronicler. They review espresso makers and coffee grinders.
TO DO:
I have researched manual calibrated tampers like Mahlgut, JoeFrex, Happy Tamper and Normcore, and looking at lever tampers like Macap Dynanometric Tamper CPS and the Mazzer Easy Tamper. Also electric tampers like Puq tampers. But I have to make sure I get one with the tamper size matching my La Pavoni which is 49.5mm.
Also looking at coffee stirrers like Café Fabrique, Yeater, Savita and Aieve.