So right now I would rank:
1. Astra SP
2. Shark
3. Bluebird (may move up to 2 on my 2nd go around)
4. Derby
5. Lord Premium
6. Personna Blue
I would like to add something. There is a site that offers 300 Shark blades for 26 USD which is super cheap.
http://www.bestshave.net/300-shark-super-stainless-de-blades-free-shipping-by-air-post-p-62.html
They also carry Astra SP's. I hope I have helped anyone.