What speakers do you have that are rated at 2ohms? If they are truly rated at 2 ohms then you need an amp that is rated down to 2 ohms otherwise the amp can over heat and burn up!

Here are a few amps rated at 2 ohms, I don't think that you will find any receivers that go down that low.

avahifi - Power Amplifiers Comparison Grid

I own some AVA gear and it is well made and the customer service is second to none. You may be able to find some good buys on used ava gear-

avahifi - Used Equipment

Ava gear has an old school look for the elctronics are state of the art and hand made here in Woodbury, MN my home town. Give the owner and designer Frank Van Alstine a call and he will steer you in the right direction for the right amp for your needs.