I say multiple varieties and colors, just like figs, there are things you will like about different varieties. IMO, you need 2 beds also. One for Everbearers and one for July bearers.
Everbearers will grow on this years wood and last years wood, there are different ways to handle them but I subscribe to cutting them off at ground level each fall. Caroline (red), Anne(gold), are just a couple of examples, most raspberries fall into this catagory.
July bearers, these are more like black berries in the sense that you get berries from last years growth only. And after they fruit and draw energy back out of the cane you cut them off at the ground. A little more work because you have to care for canes, but one of my favorites is a July bearer. Tulameen are big and sweet with good raspberry flavor, Meeker grows like nuts and the berries are midle of the road. I think Royalty is in this category, but not 100% sure; last year was my first year with it. I cut it off at the ground when I planted it and it still sent up one small flowering shoot, anyhow the berries were fantastic.
Jewel black, even though you said might be an issue , I'll give thoughts on this one too. For me, and this may be due to planting location, it didn't grow well for the first 3 years. It grows primo and floracanes. The first year it fruited it had miserable seedy little berries that weren't worth a dang. Last year saw a massive improvement, the berries were 30% bigger and the flavor was very rich. I am looking forward to this years harvest.