I use the
SIR1 and the Bricasti M7 IRs. The link to the Acousticas site thru Rekkerd seems to be down or gone, but you can still grab them from
Samplcity.
The Clear Ambiance is a mainstay for me no matter what I am working on...
I also have to mention the Valhalla Room & Shimmer reverb's......just flat out fantastic for the $50 IMHO.