Hi Skullface,
I had Akro's prior to the SP Engineerin ones, & I think they are as well made as any other after market cans out there.
For me it was all about the NOISE, & the Sp one's sound FanF**Kintastic.
I would recommend them to anyone & if I was in the market in the future for some more cans, SP's would be what I would go for...
If you go on the SP web site, there is a video of the Akro v SP cans, those are my cans, bought off my mate.
HTH
Cheers
Spike