I use the most common onE available on eBay, paid $49 USD at the time, and the output is pretty descent. On an AGA system (A4000T), hires NTSC is quite sharp. In the old days, the A1000 composite was good (not great) on a VCR and using a genlock on the A2000, the composite to VCR was good too.. The A520 sux.