Snipes: All i can say about the AP Oval 9's was that i gave them WAY more of a chance than they ever deserved over here and in a couple of different systems. Put me in the "glad to see them go" category.
As far as the Kimber's go, they are very low inductance and somewhat high in capacitance. This is due to their braided geometry, which is also good at rejecting RFI / EMI. I would not really call them "overtly lean" so much as i would say that they are not dark or heavy at all. A pretty reasonable tonal balance and a good bang for the money. For the record, the nominal impedance of Kimber 8TC is about 20 ohms and the 4TC is about 40 ohms. Believe it or not, these figures are actually pretty good compared to a lot of other cables.
As to Doug's suggestion of Nordost, this is another cable that some love or hate. My experience is that they tend to sound very fast, very detailed and noticeably lean. If a system is sounding slow and bloated ( more likely with a vented speaker than a sealed speaker ), they might be a great match. Otherwise, they tend to lean things out too much for my liking ( probably because most all of my speakers are sealed ).
As to Doug's comments about their electrical characteristics, Nordost's are lower in inductance than quite a few cables but not in the same league as Kimber's or many of the other braided / spiral wrapped type cables on the market. The nominal impedance of the Nordost design is at least twice as high as that of the Kimber 4TC i.e. right around 100 ohms ( give or take ). As such, you get less power transfer, which could be part of the reason why you have less bass weight / warmth than some other, lower impedance cables.
Regarding Chris VH's CAT5 cables, i found that they had TREMENDOUS bottom end. However, i always thought that the top end was tizzy or splashy sounding. Much of what one hears with these cables will depend on how they are constructed. How good / bad and how tight / loose the braid is will obviously alter their electrical characteristics. Just bare in mind that they are a very low inductance / high capacitance design. They are about three times as capacitive as Kimber 8TC and half as capacitive as Goertz MI-2's. As such, a "short" length of cables might be okay but if you have to run more than about 8 feet or so, i would recommend running zobels just to be safe. As a side note, use the Teflon CAT5 if you want to experiment as the standard CAT5 sounds even tizzier.
Never tried Jon's 89259 speaker cables so i can't help you there. Many folks that have tried them say that they are leaner than Chris' CAT5 design ( probably good for you ) and cleaner up top ( probably good for everyone ). This might be a reasonable cable to check into although i am not a fan of using stranded coax braid as part of a signal conductor for audio.
Other than that, i would avoid using Tara, Goertz, Cardas, Audioquest, XLO, etc... cables. I don't think that any of these cables will do what you are looking for right now.
One more thing that might solve your problem without spending any money if you are basically happy with the cables that you have. Take a very heavy sock or two and try stuffing your ports. You can vary the amount and density of stuffing to "fine tune" how much leakage you get out of it. This will lean out the over-all presentation and may give you exactly what you are looking for with a little experimentation. Sean
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PS... These are only suggestions based on my experiences and personal preferences. You might not like what i like so take everything i say / recommend with a grain of salt. In fact, you better take two grains of salt and a round or two of some fine European beer : )
