If you really want to make those Focals sing I would seriously look into a Pass INT30A but it is a bit beynd your budget (around $3500 used). I used one for awhile driving my 1008Be's before moving on to a pair of Pass xa100.5's and it is excellent. Before the Pass I used a Cary SLI-80F1 hence my recommendation and it did a fine job but not as good as the Pass.
Chuck
Chuck