I love the VH2, I'd bet it'll sound great in a strat into your Rivera!
Although if the VH tone isn't for you, why not go for something completly different - a crawler? They sound great in strats, give them lots of mid weight.
If you've got the Nailbomb and Miracle man and want a different tone, then I guess the first step is to decide to go lower or higher output from what you've got already!