If you like Benchmark (which I consider a mixer but a solid one) try to find Ancient Ancient Age. Not just Ancient Age though (also a cheap mixer).
AAA is just a few bucks more but coming from the BT distillery and having the same mash bill as Blanton's I think it's possibly the best bang for the buck you can get (because it is so cheap, not because it's better than anything else). Love me some AAA and I can drink it neat, with water/ice, or mix it and not feel bad.