Good Preamp for Adcom GFA-5400 $500 new or used

Hello all,

I am searching for a pre amp to mate with my Adcom Power amp, a GFA-5400. I would like if it has a full function remote as well. I have stated a price above, but if it is worth it I could go a bit above.

Here is my present setup:
Hafler DH-100 pre amp
Adcom GFA-5400 power amp
M-Audio Super DAC 2496
Sony D-EJ955 as transport
B&W DM601 speakers
Cable Talk interconnects
Ixos Gamma speaker cable

I miss the convenience of a remote control even though I enjoy the sound of my system(although a touch harsh up top at higher volumes, it is much better than what I previously had).

I have considered some preamps, which are:
Adcom GTP450, GTP500, GTP502
Parasound Halo C3
Anthem TLP1
B&K PT3 and PT5

I am looking for something to smooth out the top end without losing any detail or dynamics in the process.
I am leaning towards the GTP502 at present.

I unfortunately don't live in a place where I can audition anything worthwhile (St. Vincent, a barely known Caribbean island), so that leaves me to the reviews and opinions of other more experienced audiophiles like yourselves.

Any suggestions would be welcome for a good pre or even any other component that looks too out of place in my setup. (I plan to get a cd player soon as well. I am fedup with a meddlesome sony changer I have so I am using the discman in the interim)

Thanks,
Duane