Price arrangement... MP 99 - US 148 MP 100 - US 115 MP 88 - US 110 MP 77 - US 78 MP 55 - US 52 these r the price in Malaysia. All r SP version... but people normally says JP version is better... performance arrangement depends on individual... it depends on u r what type of player... just like no point giving a attacking player a defensive racquect... vice versa also... for more info, perhaps u can reffer to http://www.yonex.co.jp/badminton/products/racket/index.html or http://www.yonex.co.jp/badminton/feature/mp/style.html
The prices are way more than double in Australia. MP100 is like $300 AUD even though the australian dollar is more than half a US dollar. I think its around 55 cents