This is all coming from personal experience of owning / driving said combo's etc.

Eibachs are okay, and are a cheap fix - but (the approved ones) are actually diesel springs and as a consequence the front always feels quite crashy - the poundage is too high.

Coilovers are a smart move if you want to get the lower stance / improved performance... but if you don't want to lose your teeth > Mountune KW coilovers - best of both and won't lose your manufacturers warranty... or if you've got deeper pockets the Bilstein's as Guzzler mentioned are a very nice bit of kit as well.

On the power front, don't go for the biggest number you see, anyone can call a kit anything they like, but as has been proven, nobody has got 190PS... or near it, from that kit... Mountune 185 would be a much better kit option - you'll always get what you pay for, it's the most rounded 'kit' out there as it's all been engineered together properly, and again, you wouldn't lose any warranty you had remaining.

HTH