I am biased probably because i love the GT1's I got, but you can't beat the Meister Zetas in terms of value for around a grand, especially given linear springs and option to change spring rates.
ride quality can be close to if not better than oem even on higher 8k/6k spring rates and adjusting valving can be done in 5 mins easy.
I am really impressed with them and will definitely be the first mod on whatever my next car is.
Only con is possible delays as it took close to 3 months to get a set when I ordered my coilovers.
Customer service is not bad as they messed up sending me a wrong part and finding out once it was being installed at the shop. however after a phone call, they air shipped me the correct part and it got to me 2 business days later.