check out FastWRX.com, they got BC coilovers for the 2011 that are slightly cheaper than the H&R's, and some other options that are a good deal more expensive. As for your other question, no they will not. For 2011, with the wider track and other suspension tweaks the coilovers that fit the previous gen WRX's dont fit on the 2011. Also the STi uses inverted McPhaerson struts whereas the WRX uses regular McPhaerson struts, so I highly doubt and can't see how those would fit either.I see most go with H&R, what other options are available for the 11 wrx? Will older year sti or wrx coilovers fit the 11 wrx?
+1There are only three coilovers that I'd recommend for DD.. the RCE Tarmac series... the TiC SST series... or the KW's. All are on the comfortable side for DD, but can stiffen up for track days. RCE makes a Tarmac 2 for the 2008+. KW makes a V1 for the 2008+.
For almost anyone... I'd recommend a spring/strut combination. RCE makes one that is a bilstein strut paired with their "yellow" spring: RaceComp Engineering Impreza Cup Sport. It's gotten great reviews. Spring rates are:330 lbs/in front and 335 lbs/in rear. And the drop is 10-15mm from stock.