I just bought an Ibanez P bass clone off ebay a while back and while it sounds great, I'm wanting more thump. I'm using Hartke Lights XL's (don't laugh) and I want to move to a heavier gauge. I love the thick 41mm neck width and the baseball bat thickness of the neck. So without breaking the neck (this one seems too think to break) what gauge strings and brand would you use on my bass to get a thumpy tone with my little Ampeg combo? BTW I did a search through TB and didn't find this covered.... Thanks in advance.