Uniden Bearcat BCD996XT scanner Mobile Antenna Recommendation?

Can someone suggest a high quality mobile antenna that will work great
with the BCD-996XT in a mobile environment?

I have the Maxrad  BMAX-SCAN-1000 and it bites the big one. It is a
unity gain antenna (no gain at all) and I knew that when I bought it.

The rubber duck on my handheld PSR-800 far outperforms the mobile
antenna mounted on the right front fender of the car. I live in a very strong
signal area and most of the time mobile reception is noisy and scratchy sounding
and even cuts out completely during a conversation.

I am very disappointed with the BMAX-SCAN-1000 and would like to
replace it with another mobile that has some db gain and will fit
onto the NMO (New Motorola) type mount.

Any suggestions?

Try this antenna: 
The Comet SBB-97 is a black anodized mobile tri-band antenna.  It replaced the chrome plated SB-97 which has since been discontinued.

·         Gain & Wave: 146 MHz / 3.0 dBi / 1⁄2-Wave

·         Gain & Wave: 446 MHz / 6.8 dBi / 5⁄8-Wave x 2

·         Gain & Wave: 1200 MHz / 9.6 dBi / 5⁄8-Wave x 5

·         Max Power: 100-Watts

·         VSWR: 1.5:1 or less

·         Connector: Type N

·         Length: 39-Inches

·         Fold-Over Style