The PA has some pretty horrible air defense. Right now the PA has Crotale 4000, the Mk series, SA-2's, some KS-1 (very limited though), and maybe even some TY-90 missiles. The Mk series can most likely deter most Indian helicopters and other low flying aircraft, but beyond that the PA needs a new facelift on SAM's. Several years ago Pakistsan expressed some very serious interest on the FT-2000 missile system and some news reports even stated that Pakistan received several batteries but I have yet to read something official about that. Maybe Pakistan is probably waiting until China perfects their own copy of the S-300 missile series. I mean, what other SAM's can Pakistan buy that are available? American made SAM's will come with many strings attached, Russia isn't going to sell anything to Pakistan, France will rip Pakistan off, Germany and Britian and many other European countries aren't willing to sell Pakistan anything, and let's not talk about Israel. So China seems to be Pakistan's only option in regards to SAM.
Getting back to the subject (which I beleive was the Al Khalid), Pakistan did place another order for 330 more T-84's from the Ukraine. However, the order never materialized after research on the Al Khalid began. The fire control systems are of Chinese origin, not European (some beleive the Al Khalid uses Western made systems) and the Al Khalid also fires Ukrainean made anti-tank missiles.