Speakers range from $50 to $400/pr. Cut outs also vary greatly in size so it is next to impossible to find some that will screw right in. We have very high end speakers from JL and DC Gold. If you want awesome sound I would go that route. Otherwise most of the speakers under $200 are not going to have a tremendous difference in performance. Poly Planar makes some nice durable speakers that will be in the $100 range. This one might be a close fit for you:
http://www.polyplanar.com/productSin...px?prt=MA-6500
You can find any PP speaker on our site by typing in the 4 digit part number, like "6500" for the one above.