This is just me linking to my nearby local stores that I’ve gotten recommended. I’ll revise the list when I’ve experienced these.
Malmö
At Jägersro Center the local electronics specialist Bejoken is joined by almost-an-institution Elfa (Jägershillgatan 20. Open 8AM-6PM Mon-Fri).
More inner-city access can be given by Electrokit at Södervärn. They’re open daily at 10-16, according to their website. None of my sources have been there.
Copenhagen
Brinck at Nørreport station get a review in MitKBH. They are quirky and old-fashioned in their ways, but run a good supply.
RS online also has a Swedish website. Looks very promising.
Please post your tips for shopping area electronics.