HELP NEED UPGRADE ADVICE

Hi,

Sorry to be so vague in the heading, but I would really appreciate help from the Audiogon experts. Anyway, I can only make one upgrade at this time and would like opinions. Right now my system consists of the following:

VTL MB185 Mono Amplifiers
Counterpoint 5.1 preamplifier
Sony C555ES SACD Player
B&W 801 Matrix 3 speakers.
Cardas Golden Cross Speaker Cables
Various Audioquest and Siltech interconnects.

Now, I only have about $1800.00 or so to spend on the next upgrade and was wondering if anyone could tell me which of the following they think would give me the most improvement (until my next upgrade in a couple of months)

1. Sony C555ES cd upgrade by SACDMODS. about $800.00

2. VTL 5.5 preamp. (to replace unmodified Counterpoint)about $800.00 final cost, because I'll be welling my old preamp.

3. Northcreek B&W 801 crossovers. $1600.00 final cost

I could do the first two upgrades for the same final cost, but I'd really like to keep the Counterpoint for a week or so to compare to the VTL before I sell it. Either way, I really could use some advice.

Thanks.