Loop bundles suggestion

I see lots of companies selling different loop products bundles (ex. Loop loft). I’'m looking for a good bundle that would incluse drums, guitars, bass, etc… on separate tracks, with different BPM. Any suggestion? Thanks.

I’m not to big on sampled loops myself, but I know companies like Zero-G - Professional Sample Libraries and Kontakt Virtual Instruments & http://www.samplephonics.com/ are.

Steinberg sells loop packs for many different genres:

Their content is organized as “construction kits” which seems to be exactly what you’re looking for.