In my experience, as a defense contractor, there can be no generalization against or for chinese weapons. Completely depends on what weapons - manufacturer, etc.
US weapons however are (very generally speaking), the best in the world. Not from a cost perspective, but effectiveness perspective. 27-2 showed that. An example - if PAF was offered for free - a squadron of F-22s or a squadron of J-20s, without taking politics into account, what do you think PAF would choose?
At this point the US already has developed prototypes for 6th gen. And a multitude of other weapons. Pak has been burnt with Chinese weapons a few times so far - Z-9s, F-22Ps, are to name a few big ticket items. Who knows what the future holds? You love the VT-4s so far, let's see how long they remain loved - Bangladeshi experience with NORINCO tank - looked flashy but now leaks water when it rains!
As someone who has worked with the BN at the highest level - the Chinese ships we have are incredibly breakdown prone. A saying in the BN - that these ships run on the blood of the engineers assigned for maintaining them.
Buying sh!tty gear that takes up endless resources, both human and material, to keep running but don't perform when push comes to shove - that is the danger and reality that many budget conscious countries are facing.
Then there are so many issues that can only be understood at the micro level - like Chinese Type-56 rifles are excellent - if they are from the old stock. If you buy them from NORINCO and they are a new production - they are horrible to use. So you really have to be extremely diligent when buying Chinese. In BD MoD - they often specify clearly that for a certain item, they have to be from within a list of countries - and that list often skips China. Not because BD doesn't want closer ties with China - but because of past experience with the quality of their equipment.
The reason that JH-7s make sense is also a micro issue - they are relatively good quality equipment - with British engines and a simple structure that is dumb proof. They can play a role that is 100% relevant today - AShMs, BVR magazines and ability to threaten the entire Indian coast with ASMs. The fact that PAF does not understand this, is understandable. However, PN surely is suffering from that lack of appreciation.