I think the flame bee would be a great idea, as they aren't that common. John Berry's book has a great comparison photo of a flame bee next to a spider. There is def a noticeable difference, with the Flame Bee being lighter than the normal spider. I think the Pastel Russo Spider would be a nice combo, and I'm sure it's been done by now, but I haven't seen it.
If I were you, I'd def go for the Flame Bee. Bumble Bees are beautiful, but the market has been flooded with them.