After exchanging a few emails with D-Link they could not fix my problem. When I try to use Draft N (300 mbps) I cannot play music smoothly, it also does affect the mouse. This is the setup I am currently running.
2.66 Ghz O/C to 3.00 Pentium D (Duel core)
Geforce 8800 GTS Graphics
D-Link Range booster N PCI card
D-Link DIR-625 Router (Rev A2) (Firmware 1.09)
1.5 Gb pc5300 ram
Now, when I switch it to G 54 mbps the problem disappears. It is very annoying and would like to know if there is any way to fix this.
EDIT: It also drops connection every once in awhile.