New Impellor for Superjet

I have a 1994 Superjet 701cc with the following engine modifications:

-Factory B pipe.
-Milled head 165 psi per cylinder.
-Flame Arrestor on a single 44.

Now it is time to change the impellor and I like the unit that is installed.
It is a skat-trak something...I bought it with this impellor and the seller
did not know what it was.

I was thinking about a Skat-Trak super-slimline 14.5-18.5.
Is this a good choice for best all around. I mostly like the bottom end
but....you know how it is...a good top is a must also.

Help me out.