In answering your question, I would buy a nice amp. The 1070 is still pretty good and F30s are really nice but love to gobble up power so I would suggest a McIntosh MC352. I think you would be impressed by the improvement.
However, there may be even better upgrade potential in a new preamp. I feel the preamp is generally underestimated in the audio chain and in my experience, can make a very siginificant difference - moreso than amp upgrades. I haven't come up with a reason why that has been the case in my system but I have owned about 9 preamps and they have all been very different from one another. This has not been AS MUCH the case for my amps. I haven't had very good experiences running a CDP straight to an amp - dynamics and three dimensionality suffer too much for my tastes.
Digital technology moves more rapidly than amplifier design so I would keep the budget for a source more flexible to be able to change it more often. The preamp, amp and speakers are worth investing more at one time. By the way, you gave good information for me to make a worthwhile suggestion. So may people expect the answer to just fall from the sky.
These are just my opinions - you will have to do the exploring yourself. Good luck! Arthur
However, there may be even better upgrade potential in a new preamp. I feel the preamp is generally underestimated in the audio chain and in my experience, can make a very siginificant difference - moreso than amp upgrades. I haven't come up with a reason why that has been the case in my system but I have owned about 9 preamps and they have all been very different from one another. This has not been AS MUCH the case for my amps. I haven't had very good experiences running a CDP straight to an amp - dynamics and three dimensionality suffer too much for my tastes.
Digital technology moves more rapidly than amplifier design so I would keep the budget for a source more flexible to be able to change it more often. The preamp, amp and speakers are worth investing more at one time. By the way, you gave good information for me to make a worthwhile suggestion. So may people expect the answer to just fall from the sky.
These are just my opinions - you will have to do the exploring yourself. Good luck! Arthur