Cvt, I would recommend the combo of a Pass LabsX-350.5, which can be bought at a great price as a used/demo piece here on the GON, and Placette passive pre-amp.
I have heard this combination and its sounds wonderful, it would fit your budget, and easily drive your new speakers.
It always comes down to personnal taste and system synergy, but for my ear's the 350.5 and Placette are much better sonicly then the gear you mentioned in your post. If you are interested in more details regarding the 350.5 take a look at a reveiw I posted on it here on the GON.
I have heard this combination and its sounds wonderful, it would fit your budget, and easily drive your new speakers.
It always comes down to personnal taste and system synergy, but for my ear's the 350.5 and Placette are much better sonicly then the gear you mentioned in your post. If you are interested in more details regarding the 350.5 take a look at a reveiw I posted on it here on the GON.