Same goes for Pianoteq, with their highly tweakable D4 (Steinway), K2 and Bluthner. No samples, but 40 MB (yes!) of physical modeling. Pianoteq 5 Standard is on sale at 30% off. If you prefer samples, have a look at Sampletekk's grand pianos (as they're half price now during their annual summer sale). Many of them are for Kontakt, EXS24 and HALion. As for Kontakt, also look into ProductionVoices, they have some fine grands, regularly on sale. The new Pearl grand is 20% off at ImpactSoundworks and SonicCouture's Hammersmith is 30% off at BestService. There are many other choices, I just gave you those on sale.
Edit: if you prefer to spend less, Pianoteq's Stage version is on sale at DontCrack, the Standard version at Modartt.