IMHO – that oem flyer looks more like a bmx race bike type bike rather than a park bike, and thus isn’t likely to be as strong or as much fun. They look like fun cruiser type bikes really.( i recon anyway )
The DMR looks strong.
Just get a 20inch bmx with a long top tube if you tall.Will be much more fun at a skatepark, or a strong park / street type 24 inch bmx( if you can get them?)or jump bike .BMX Tyres will last ages anyway indoors, and even is your riding offroad a bit then tyres are easy to come by.
Generally – if you see a bmx with just a rear v brake – then it’s for racing or cruising around on – and not much else. ( Like that skyway bike ) Some decent dirt jump mtbs have a just a v brake though which is fine. A rigid basic dirt jump bike would be ideal if 20 inch is not your thing ( this could well have a v brake which is fine )
24 inch dj could be good for indoor parks. That’s what i’d prolly go for, if i’d decided against a 20 inch bmx.
like this
or this