Mcintosh c2600

Thanks d2girls.  Preamp needs to have DAC and HT bypass.  I don’t have a lot of room and if I can find a preamp with dac built in it is a plus. I have always wanted Mac equipment.  If I buy the preamp I will eventually replace the amp with Mac also.  

Any thoughts on the Mc 2600 vs Don Sachs new pre amp?

I bought a c2600 just last week, open box, and love it so far. It replaced a c47 and before that a Peachtree NovaPre. I like the c2600 the most and the tubes make a positive difference for me. Very open soundstage and an amazing midrange. And as you noted it has a DAC and HT bypass though I don't use it, Overall I'm very happy with it. And yes I have it paired with a Mac amp. 

Between Mcintosh C2600 and C500 wich one it's better?

I've owned several pieces of McIntosh equipment over the years, currently have a C2500 paired with an MC452 to drive a pair of Focal speakers.  I think the C2600 has an upgraded built in DAC compared to the C2500; in my case I used a PS Audio DirectStream DAC, so that difference didn't make sense to me.

After breaking the C2500 in I upgraded the tubes to Gold Lions and that further improved the sound quality.