I have a set for salea/d/s/ 346is. However, you'll have to fit 6.5". I think a lot of people around here fit them just fine though. You can find pics in my for sale ad and in my sig
http://www.grandprixforums.net/d-s-speakers-46684.html
Watts and RMS really don't matter. What matters is setup and design. Personally, since you're running two way up front I suggest running your mid as low as 80hz with a 12db slope or 24db HP slope. Do the same with your subwoofer.
The point being, if you're trying to run 20hz through your mids up front they won't be able to handle much volume. ~70hz is the point at which you lose the ability to localize a frequency. That's why it's a good crossover point for sub and mids. No point in trying to playback something in your mids that the sub can do easily; especially below 80hz. However, if you want the best setup ever, I hope you have time and money. Your job at that point would be to install a 3-way setup with the mid bass running as low as 50hz and as high as 200hz. A 3-way can be EXTREMELY difficult to tune. I would suggest paying an experienced audio shop. The reality...you'd be very happy with a 2-way and I could probably walk you through basic install and tuning.
However, if I were you I'd just go to a store where they're all displayed; close your eyes and have a friend activate the button selections and enjoy whatever it is you land on.
If you have other questions...shoot.
