Credit Cards: Does it make sense for me to keep the Brilliant if I also have AmEx Platinum + Gold and the CSR?

I have both the Aspire and the Brilliant. I'm considering dropping one or the other. My allegiance has tradtionally been with Hilton but I've had a few disappointing experiences recently while I've had nothing but positive experiences with Marriott. Given my lineup (Platinum, Gold, Brilliant, and CSR), should I switch to being a die-hard Marriott enthusiast (and drop the Aspire)?