I'm afraid that with a question like this, you're going to get so many different answers that it will make your decision harder not easier.
That said, I'm with obsidianbass in the pressure wound club. I haven't tried the GHS Boomers Pressure Wound, but I imagine they probably sound much like the DR Nickel Lo-Riders I just put on my bass. They're also pressure wound strings, and they sound amazing! They were a tad on the bright side for a few days, and now that they've settled in, they have that classic Fender "growl". I absolutely love them!