The "best" really depends upon what your needs are. We have a number of warehouse management solutions listed in our Product Finder, which you can browse through via that link.
Hi Omar -
Are you still looking for an ERP with Warehouse Management capabilities. I'm assuming you are still looking as many ERP's don't have great WMS capabilities. I'd be happy to discuss Snapfulfil as a best of breed WMS solution to augment your ERP. We have flexible integration to ERP's and have Tier 1 functionality to support your business. Happy to help where needed.....