Best Way to Spend ~ $2000 for System Improvement


Hi fellow music lovers! I have about $2000 right now to improve my system. It can be for any component, but I'm thinking amplification first, power, pre, or integrated. SS or tube.

To begin, right now I have a Mccormack 0.5 Deluxe power amp with "A" revisions, an Eva 2 passive preamp, Metrum Octave v1 DAC, Dell laptop for music files. Sometimes I use a Teac H750 as a transport and GMA Pico Executive speakers. The room is small, about 14x18x10ft. I listen to about 50/50 rock and classical, mostly full orchestral. As far as just sound goes, I would like the bass to be "fast". No delay or overhang, not exaggerated, but detailed. Detail is important at any frequency, the more the better, but not at the expense of musicality. I realize at this price point, compromise is necessary, and treble would be the best place for that. No harshness allowed, but I'm in my later 50s now and don't hear treble like I once did.

I hope I've given enough info to get some good suggestions. I like the sound now, but think it could be better, maybe a slightly lower noise floor and a little more pace and rhythm while retaining it's sweetness and smoothness. Any advice would be greatly appreciated. Thanks in advance. BTW, if any existing question answers any part of this question, feel free to link it.
xrayz
Replacing all the fuses in your system with synergistic research black fuses is the most cost effective way to improve your system.
This is serious recommendation. About a year ago I replaced the fuses in my SACD player, preamp  and power amps with synergistic red fuses and was shocked at the extent of the improvements. The change was exactly the same as one would expect from a major pre-amp upgrade.. However
the 7 fuses I installed cost less the $600 compared to about $2500 it would have cost to upgrade my preamp. . I have been modifying amps and preamps for more than 20 years. Twenty years ago most audiophiles did not believe that upgrading passive components could  improve fidelity in the same way as active components. I replaced all the film caps in my preamp with high quality polypropylene caps  with dramatics results. I  later updated my diodes and resistors with  the  same awesome results.
Twenty years ago most audiophiles were skeptical of the benefits to be gained by cables and power cords. Some people require explanations  before taking the plunge when something is new. However many of the most effective improvements came not from manufacturers but from audiophiles like Steve McCormack.
Good luck
Best 2 Grand you can spend and live with for a long time ?
 Cables and interconnects ,
Kimber, Wire World , and Purist , Buy there lower end there fine
After further reflection, I realize that my earlier recommendation is not
in accordance with your stated preferences. I apologize for this. Here is my amended and final recommendation. Spearit Sound (Tel: 877-853-7425) has a DEMO McCormack LD2 preamp on sale for $1499. I am very confident about this recommendation because I have this same unit. It is a great pre-amp. It is line stage only. It comes with a good warranty. Incidentally, it uses only one fuse so the fuse upgrade would cost about $120.00. Your total expenditure would be $1619. This is one of the best values in audio today.  
nyame your final sentence seems synonymous with McCormack gear not just the aforementioned preamp. Newer and older for that matter. The LD2 is a worthy contender in terms of sound and build quality. The volume controls are worth pointing out while the window for gush is still open. I should of went with that unit while I had a chance to. Theres no shortage of positive reviews adorning them but I was bitten that way in past circumstances, therefor hesitant. Having heard one after the fact I am still kicking my self a little bit.