Good tube preamp with Sony 5400


I am looking for a tube preamp for sony5400 running Focal 918s. I set my sights on the Doge 8 and looks like about a 2k investment with tube upgrades.
Is the Doge in the same coversation with the likes of Cary, Joule, or even Mcintosh C220?
I am looking to warm up a bit.
Would an extra $500 to $1000 investment make a big difference?
mcpherson
Today I went to listen to Sonus Faber Cremonas.
They were hooked up through a processor as the pre and sounded less than stellar.
The whole time I was thinking "Man, Im glad I got that Thor preamp!"
thor audio preamps with teds upgrade kills...what a improvement in sound!i am usually skeptical..but I have been to teds house when he lived both in ma. and ct. now in texas..most down to earth dealer in audio..he probably doesn't profit much in this business as he is to honest.He delivers..hope to meet thor man some day as we live 10 miles from each other and have an all thor system