I’d change the logo to make it stand out more and be more memorable. IE: simpler. Plus i’d drop the splash page and go straight to content – you can only lose visitors with a splash, never gain them.
I’d add Wild Jack Casino (Jackpot Factory group, previously 7Win7) to the list as its Microgaming which may appeal to more experienced gamers too. keep an eye on http://www.spin3.com for developments too.
Cheers
Simmo!