I am interested in purchasing a D3 for My 1998 Acura 2.5TL I wanted to know what all would i need to purchase in order for a nice and smooth installation. I wanted to purchase the xm traffic thing as well. Also, i have an aftermarket Pioneer DEH-770MP currently installed as of now.... Any Input would be appreciated.

Since you already have an aftermarket head unit, you can just reuse the wire harness from that. For XM Traffic, you will need to purchase the GEX-P10XMT as well.

As far as I know, the '98 TL has a double-din opening, so it the D3 should sit flush w/o the need for a dash kit. However, I checked Scosche's website and they have a dash kit available for your car (Model: HA1566B).

http://scoscheweb1.scosche.com/pdf/Scos ... 0_kits.pdf