I have been looking for this combination for a long time, and now finally I'm ready to lower my car

(my front bushing is damaged, so taking this chance to fix it at the same time) However, I went to the shop today, I noticed that the combination of GC and Koni is not comparable to Tein Basic. (BUT I remember it was even put into comparasion with Tein Flex, wasn't it??)
Anyways, I couldn't make a decision now, and I'm overwhelmed with misleading informations. I really need help from you guys. I'm looking for comfort and handling. The shop owner claims that even Tein Basic will have better comfort and handling than OEM, and also over takes GC w/ Koni. Since GC is a universal spring, and Koni is not adjustable (right?), this combination makes no competition for all Tein coilovers? (BUT in NTPOG's website, the FAQ says there is a Koni specificly for GC?
http://www.ntpog.org/reviews/groundc...dcontrol.shtml 
)
What should I get for a good ride without worrying about "what is that squeeking sound coming from", "why is it so bouncy", etc. First, I know I need a top pillow mount which is offered in Tein but not GC w/ Koni, so should I take GC off my list now? And Tein Flex and SS cost over 1000~~ (550 is around what I'm aiming for, and 700 tops

)
Need help now! All expert or personal experiences welcome!!