There are few good ones. Some are so close in performance that unless you test them on the car you wont know which is the best for you but about 8 or so intakes will be so close you wont feel the difference. Here are a few good ones for street/strip:
Eddy Performer RPM
Holley Street Dominator
TM-7
M-1
Eddy Victor
Indy single plane
Indy dual plane
Torker II
Thats just to name the ones I can think of off the top of my head. If the car is going to be more street you might consider a dual plane as the RPM and Indy dual plane are very good intakes. As I said I use the Indy dual plane and I would rate right at the top. It can be had with standard or max wedge ports but its not cheap. The RPM will also work good on a street/strip car. My son runs the RPM on his .030 over 400 and it is a bit faster with it then the single plane was. Course the Holley Street Dominator works very good as it has good low end for a single plane. Some single plane will require that you have enough gear and converter for them to work real good as they work great on race cars with alot of gear. And the Victor makes serious power but is tall and dont fit under some hoods. If I were you and your not in a super hurry I would check out some swap meets and see what you can find at a good price and grab it. I picked up a Holley Street Dominator for $75 dollars at a swap meet and thats one of the best intakes for your combo. Ron
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Womanator I am curious as to what gear and converter you have in the Dart as its 60 seems a little soft. Here is my 60 on an et about the same as yours and I am using the Indy dual plane ? Is that your best 60 ? I use a cam very close to the .590 as mine is .585 and .592 lift. My 60 is a bit better then yours but you have a bit more mph. Ron