Would the resident Bag End experts please offer some advice on the best combination of BE cabs to go with the Eden WT-550? I was originally thinking an S15D plus S15XD, but I'm wondering if there is a less expensive combination that would still give me a nice, well rounded frequency response. Maybe S12D plus the S15D, etc... I'm playing rock, jazz, a little slapping with a B to C six string. Thanks!