I've been through a number of strings on my P-bass. Here's what I'm looking for (basically things that bring out the best in a P): Warmth Punch Great low-end fundamental Some growl at the bottom A decent slap tone I'll probably go with a .100-.45 set. From what I've read all of the above can be accomplished with DR Sunbeams but want to be absolutely sure before plunking down money. Definitely think I want nickels. Strings I've had in past but had qualms: Fender 7150s (low output, kind of a boring tone to me) D'Addario Chromes (nice strings, just flatwounds. want rounds) TI Jazz rounds (these are also great strings. but I'm tired of playing my P-bass like I'm going to break it, and not good for slap really) Fender Superbass (lack in warmth to my ears, otherwise these are pretty good too) elixirs (not warm enough as well, love the feel though and good tone when worn in) in other words I feel like I've had a bunch of strings that come close to what I want but none have really nailed it. I've never had a pack of DRs and know there's a lot of people who swear by them here. Just wondering if the Sunbeams will do what I want. Or maybe someone can open my eyes to another string brand.... Also if someone can clarify what will be the difference between roundcore and hexcore. Looking at DR Nickel Lo riders too...I'd be interested to hear if someone has played both Nickel Lo Riders and Sunbeams, and what they prefer.