Aphids don't really do a lot of damage to roses. They mainly just drive the gardener nuts!

Crispy, curled tips/leaves could be caused by several things--perhaps too much nitrogen, among other possibilities?

It will be interesting to see what other diagnoses posters come up with.

Kate

The crispy tips I've experienced had borers in the stems--not the kind that enter through cut cane ends but that lay eggs on the growth tips. You should also check the underlying cane stubs, if any, for damage. The general cause is that the stem isn't pumping enough water.

I've never seen aphids cause anything worse than slightly deformed or undersized leaves and flower buds.

Sunnyside,
I don't remember where you live in zone 5, but you might want to check with other local rosegrowers to see if midge is a local problem and if it is, when does it appear locally.
Burnt looking non-blooming hook shaped tops of roses are three symptoms of midge.
The midge burrow into the stems close below the buds as they are growing and you don't see them inside of leaves.

Midge isn't a good thing. I've had it on two Ingrid Bergmans and got it under control because I happened to have seen it the previous year in PA and asked the gardener how to handle it.

Good luck.