I'll say Rat too, but if your at all handy with a soldering iron, I strongly recommend the BYOC Rat. You won't be disappointed. You get the original LM308 chip and 6 tonal options - its just under $100
http://www.buildyourownclone.com/mouse.html
Otherwise, I'd suggest the 2 Dano pedals (Tranparent OD, and the Drive)