Thoughts on these cluster rings (& suppliers)

[scotpot]

My wife is looking for a cluster ring and has narrowed it down to these. Any thoughts of advice would be appreciated:

http://m.ebay.com/itm/381422540627
http://www.ross-simons.com/products/847364.html
http://www.ross-simons.com/products/847341.html
http://www.ross-simons.com/products/769201.html
http://www.grayandsons.com/s510182-magnificent-flower-shaped-diamond-rin.html#additional-info
http://eragem.com/3-tiered-diamond-cluster-cocktail-ring-14k-white-gold.html