Christopher,
I know what you mean about that "fat" in your face sound. my GR ME-1NV gives me that but single channel was 1k, the Speck 5.0 gave me that but single channel $800ish. the Chandler is super, but its $1700.00, this is also the catagory the $475.00 RNP miracle (I own as well) isnt quite that "fat" in your face sound your looking for.
The Sebatron came to mind, as mentioned, but I dont think I would take a chance on that due to its internet only word of mouth 9unless you can get that cat down under to send you one to audition) . plus, I'll bet your Peavey isnt too far off from that piece any way (both tubes) are you sure you want to sell it?
the OSA (2 units and the lunch box) will put you around the $1500 mark as well as the Brent Averil lunch box and his two API units (which would be my choice over the OSA) IMO....If you can find the Vintech
Dual72 on Ebay or used for 1k (which might be possible) that might be your best bet for that "fat" sound your looking for. the Vintech is a slight bit on the darker side due to its Nevesque adesign.
One other possibility, would be the release of the new Toft ATC 2 channel mic pre/compressor/EQ $900ish. its based on the Trident where you should get some slight color with a bit more clean punch (might be ideal for kick/snare) especially with the comp/EQ section said to be really nice.
the Buzz audio MA-2.2 pre is said to be a very nice clean yet punchy 2 channel pre (though it goes for $1800) Buzz has the new SSA-1.1 which is a two channel pre with a few less features using the same pre's used in the MA2.2. the SSA1.1 goes for about $1200 due out anytime.
seems like at the 1k point you're about $200-$500 away from getting that punchy fat sound your really looking for. maybe it means saving a bit more and making it worth the wait?....so as I said, find the Vintech deal for 1k and thats probably your best bet. (even at $1200.00 its still a great piece) however, if its $1200.00 for that, I'd just stay put for another 300 and get the super punchy Brent Averil API's/lunchbox they kill on drum overheads and/or kick and especially snare. (plus you'll be able to fill the rest of the 6 space box up with more units, you could even put on or two OSA units in there as well for a slightly different flavor)
good luck