just keep in mind that the PF15HE's are 8ohm cabs, and I don't think SVT's are tapped for other than 2 and 4ohm loads. So, you would have to run at least 2 PF115HE's to get to the 4ohms.
Power handling on these cabs is 450w (8ohms), so unless you dimed the SVT, it would probably work fine (other than the ohm issue). 2 115HE's would be totally fine and probably sound pretty good.
I use a PF500/115HE rig for rehearsal and it is quite a nice sounding rehearsal rig.
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