The best replacement for ion 2 is ion 3.

The best alternatives to ion 2 are rated as following:
★★★★★  ion 3
★★  gma 3150
★★  6310
★  4250
★  saturn ion 3
★  hd 6320
★  ion

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Speaking about ion 2, one probably shouldn't forget about d510.

Other search terms related to ion 2 and their ratings are:
★★★★★ d510
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ion 2
ion 3
gma 3150