i'll first echo your friend on the A90 as i own 2 of them; and it is different enough from the XV-1s that it's something new. it's more vivid, transparent and articulate in the bass than the XV-1s.
i like the Titan i but have never lived with one. some consider it a bit lean. it's great at space. i own a Lyra Olympos SL which is a bit more 'fleshed out' and sweet compared with the Titan but it's also twice the price and scarce.
i've owned an XV-1s and have always considered it about the perfect all around cartridge.....of which maybe the A90 has now one-uped it by a small margin as it's more neutral and detailed.....and still relatively affordable.
maybe consider which direction from the XV-1s you want to travel. more detail? more body? more space?
good luck and even if you stay with the XV-1s you will still have one of the world's best.
i like the Titan i but have never lived with one. some consider it a bit lean. it's great at space. i own a Lyra Olympos SL which is a bit more 'fleshed out' and sweet compared with the Titan but it's also twice the price and scarce.
i've owned an XV-1s and have always considered it about the perfect all around cartridge.....of which maybe the A90 has now one-uped it by a small margin as it's more neutral and detailed.....and still relatively affordable.
maybe consider which direction from the XV-1s you want to travel. more detail? more body? more space?
good luck and even if you stay with the XV-1s you will still have one of the world's best.