For a traditional strat tone, I kind of like the Hot Gold. I say, kind of, because they do lack some low end that you really notice when you play clean. I had Hot Gold, Hot Gold, Purple in my Koa strat and it sounded similar to my Black strat clone that has the Fat 50, CS69, SSL-5. I changed the Koa strat to Purple, Hot Silver, Blue just to be different.
The Blue, to me, is almost an exact copy of the Seymour Duncan SSL-5. Very hot and fat sounding.
The Purple is probably my favorite. A little less output than the Blue. Works great in the bridge or neck.
If you want to keep the strat quack in positions 2 and 4, put a Hot Gold in the middle.
Here's a combination to consider:
Neck: Purple or Light Blue
Middle: Hot Gold
Neck Dually: Burgandy-Blue (Both work well as singles in the bridge)
This place sells more Dually combinations:
http://www.aampselectricguitarstore.com/lace_pickups/lace_duallys.html