I have no experience with any of these subframes, I'm modifying a stock one. Cost wise it's probably the cheapest solution even when you go for expensive parts. AME for example sells the bare frame for like 3k, and I will have less than that with AFX spindles, new upper/lower arms, springs, shocks, sway bar, and steering.
The aftermarket ones may weigh slightly less but I doubt there will be much difference in the performance.
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