No way would I change from what you own and enjoy. I have always liked VonS.
If you'd have offered up the VR4s with the two you're thinking of I'd have picked them anyway over the others. Totems always seemed too punchy. I've heard nice Salk speakers but I'd not guess them better. I'd keep and enjoy what you have.
The grass may seem greener... Buying a non-auditioned speaker is highly risky.