Garrett turbo help required

[Safari Swb]

Last weekend my turbo grenaded, so i am going to purchase a DSR replacement turbo. I know sweet f/a about turbos so I need a bit of help choosing a replacement

My current turbocharger is a garrett t25 with .48 compressor and .49 exhaust wheel.

I would like to get a turbo that comes on boost earlier. Do i need to purchase a turbo with a bigger exhaust wheel to do this??

Would this suit my application??
http://www.trademe.co.nz/Trade-Me-Motor ... 024520.htm

engine is a nissan rd28t

any help is much appreciated!!!

[mud_slinger]

prob be same turb or close to as a silvia or blubird turb.you can pick those up 2nd hand cheap enough