im trying to make my mind up, currently have a 4.5 pkd cent. in the right wind, great kite love it. 2.5 and a 6.5. now do i want a butane evo II 4.9 to replace the 4.5 as i want a move up to date kite. and replace the other as time go's on , or do i buy a 4.9 nitro II, and have no cash left for any more?