It really depends on your budget. I just upgraded from a Trigon Vanguard / Volcano combination to a Herron VTPH-2. The Trigon combo is a great ~$1k phono stage. The Herron is a great ~$4k phono stage.
You can check out a review of the HK on the Stereophile website that includes measurements. I wouldn't say the VPI, Ortofon or HK are weak points, but the Stereophile review does imply that the phono stage could be better. I don't know the speakers, but they are Revels, so can't be bad.
You are looking for an interconnect from the turntable to amp with low capacitance. Again, it is a case of budget. Cardas makes some that are very good. If you don't have the budget, try the Blue Jeans LC-1's.
To be honest, I would look at setting up the speakers first and working on integrating the sub and speakers properly.
You can check out a review of the HK on the Stereophile website that includes measurements. I wouldn't say the VPI, Ortofon or HK are weak points, but the Stereophile review does imply that the phono stage could be better. I don't know the speakers, but they are Revels, so can't be bad.
You are looking for an interconnect from the turntable to amp with low capacitance. Again, it is a case of budget. Cardas makes some that are very good. If you don't have the budget, try the Blue Jeans LC-1's.
To be honest, I would look at setting up the speakers first and working on integrating the sub and speakers properly.