Guys I appreciate for all the advice. I wanna make sure one thing I across Avid hd website and this is what I found this is from Avid website I copy pasted..
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Overview

Create professional-quality, richly detailed productions, quickly and easily, with the lowest latency of any host-based DAW. With Pro Tools|HD Native—a new generation of Pro Tools HD core system that harnesses the power of your Mac or PC—you get amazing sound, incredible performance, and the lowest latency on the host. Whether you create music or sound for picture, equip yourself with the tools you need to compose, record, edit, and mix with great speed, ease, and reliability—and hear what you’ve been missing.
A complete Pro Tools|HD Native system is comprised of a Pro Tools|HD Native PCIe card, which comes with Pro Tools HD software, and your choice of one or more Pro Tools HD Series audio interfaces:
I am very impressed with its stability. I tried very hard to break it but I couldn't! Well done Avid, a stunning product that works from day 1.
Mike Thornton, columnist for Sound on Sound
HD Native PCIe card and Pro Tools HD software—Unlike USB- or FireWire-based DAWs, which are inherently prone to latency, Pro Tools|HD Native employs a high-speed PCIe core card, greatly improving monitoring while recording. By eliminating distracting latency, increasing your I/O capabilities, and providing 64-bit floating-point processing for more headroom and a higher mix resolution, you get a professional native solution that meets the highest audio standards. And with the tight integration of Pro Tools HD software, included, you have all the tools you need for studio-quality music and audio production.
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My question is how would this affect sound quality , its claiming to have the highest sound quality. this works with pro tools hd sound card. I have heard on this forum and understood that sound quality in "mixing" or getting a balanced quality mix with detailed sonic quality has to do with internal processing inside the DAW and therefor not the sound card, ....please clarify me on this guys how does this work? or is it because the dsp power? I hope I'm clear.. Thaks guys, Best Regards