What's your budget? Will you need more than two channels?

I don't know what you've heard about Presonus, since they make some good pre-amps, but maybe nothing that would suit your requirement. Another make you should look at is Audient, in particular their Mico, which is an excellent two-channel pre-amp with built-in ADC. I have used a Mico to go via optical S/PDIF directly into a Macbook Pro, and this combination forms a very compact high-quality arrangement. The Mico can be used either for two microphones (with phantom power) or one microphone and a DI input for guitar. I believe the 2011 Macbook Pro (with Thunderbolt) still has the optical I/O as the specs continue to say "digital/analog" for the line input and output, but you would have to check this.

I'm assuming you are planning to get a condenser mic in the future, as phantom power is not needed for your SM58.