Given your preference for quality and convenience, and a willingness to spend more for the best options, Hackney and Stoke Newington are the neighbourhoods most similar to Dalston.
Hackney, particularly around Broadway Market and London Fields, offers a similar blend of independent shops, cafes, and a much-loved food scene. Broadway Market, running between London Fields and the Regent's Canal, is a particularly pleasant street to explore, especially on a Saturday when the market is in full swing. You'll find a good selection of boutique hotels and serviced apartments here, often with modern amenities.
For couples, Hackney provides a relaxed yet engaging setting. You can spend your days browsing unique boutiques, enjoying a leisurely brunch, or strolling along the canal. Evenings offer a selection of quality restaurants and pubs, many with outdoor seating. The proximity to green spaces like London Fields also provides a nice contrast to the urban environment.
Stoke Newington, a little further north, shares Dalston's independent spirit but with a slightly more relaxed, village-like feel, particularly around Church Street. This area is known for its independent shops, cafes, and pubs, set amongst attractive Victorian and Georgian architecture. It's a bit quieter than Dalston but still offers plenty of options for dining and entertainment.
Stoke Newington is an excellent choice for those seeking a more relaxed pace while still having access to quality amenities.