what do you guys think of these tranny coolers? which one do you guys think would be best? how big of one do you guys think will be sufficent size for the ocassional track use? which ones would be over kill?
B&M Racing Trans Cooler

130-70266 SuperCooler 28,000 GVW (11'' x 8'' x l.5''), $59.99
Perma-Cool Thinline Trans Coolers
771-1010 Trans Cooler 14,000 GVW $25.99
771-1011 Trans Cooler 16,000 GVW $29.99
771-1012 Trans Cooler 18,000 GVW $35.99
771-1013 Trans Cooler 20,000 GVW $35.99
771-1014 Trans Cooler 24,000 GVW $41.99
771-1015 Trans Cooler 22,000 GVW $39.99
Perma-Cool Trans Cooler
771-1305 21,000 GVW — 1-1/2'' x 7'' x 18'' Kit $76.99
771-1306 24,000 GVW — 1-1/2'' x 7'' x 21'' Kit $89.99
TCI High-Tech Performance Coolers
890-823200 3/4'' thick x 7-1/2'' wide x 12-3/4'' long $59.99
890-823500 3/4'' thick x 7-1/2'' wide x 15-1/2'' long $63.99
890-823800 3/4'' thick x 10'' wide x 15-1/2'' long $69.99
TCI Universal Trans Cooler
Coil size: 3/4''h x 7-1/2''w x 12-1/2''l $41.99