Lets face it the Americans are avid collectors of their coins hence the rather overpriced market for Eagles and Buffalo on eBay and other auction sites. Many UK sovereigns are extremely rare but don't command the same price. SO if you can get an American coin at a decent price, I would say go for it....22k or 24k. I recon you will be able to get a better resale price for it in the future (depending of course on the price of gold when you decide to sell). Having said that, the UK Guinea and Sovereign prices have soared in the last 10 years so you can't go wrong with a key date British Guinea or Sovereign in high, desirable condition either. IMHO.